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"Nowadays almost all man`s improvements, so called, as the building of houses and the cutting down of the forest and of all large trees, simply deform the landscape, and make it more and more tame and cheap." (Thoreau, "Walking", 1862) "It`s OUR flag too" (anti-war poster, Washington, 1/18/03)
Thoreau`s Vision of Insects & the Origins of American Entomology paper ISBN 1-4010-3328-8 hardback ISBN 1-4010-3329-6 "contains a great deal of valuable material" (Thoreau Society Bulletin)
The Man-Moth always seats himself facing the wrong way and the train starts at once at its full, terrible speed (Elizabeth Bishop)
THE METAMORPHOSES OF WALDEN In 1848 Thoreau transcribed sections of Coleridge`s Hints towards the Formation of a More Comprehensive Theory of Life which had just been published. At the same time he made a copy of Spenser`s "Muiopotmos or the Fate of the Butterflie," where the life of the insects is viewed by the reader from as great a distance as the Olympians look down upon humanity, akin to that doublet Thoreau identified in his own character watching his active self (134-35). Coleridge`s Hints is "a treatise on the use of natural history as means to the discovery of underlying laws of creation" and was an essential literary starting-point for Thoreau`s more technical exploration of what is today cladistics. For Coleridge, had nature progressed no further than the flora and fauna, "the whole vegetable, together with the whole insect creation, would have formed within themselves an entire and independent system of life." He draws on Heinrich Steffens (1773-1845) for the adage "THE INSECT WORLD IS THE EXPONENT OF IRRITABILITY, AS THE VEGETABLE IS OF REPRODUCTION." What Coleridge crucially provided Thoreau with was the encouragement, even perhaps in terms of authorial authority, the right, to merge a scientific approach to nature with his kaleidoscopic imaginative sweep over the living ecology of Walden. William Ellery Channing, poet and a walking companion, gives an indication of the day-to-day life of the writer in his Concord habitat: "Insects were fascinating [to Thoreau], from the first gray little moth, the perla, born in February`s deceitful glare, and the `fuzzy gnats` that people the gay sunbeams, to the luxuriating Vanessa antiopa, that gorgeous purple-velvet butterfly somewhat wrecked amid November`s champaign breakers. He sought for and had honey-bees in the close spathe of marsh-cabbage, when the eye could detect no opening of the same; water-bugs, skaters, carrion beetles, devil`s needles (`the French call them demoiselles, the artist loves to paint them, and paint must be cheap`); the sap-green, glittering, iridescent cicindelas, those lively darlings of Newbury sandbanks and Professor Peck, he lingered over as heaven`s never-to-be repainted Golconda. Hornets, wasps, bees and spiders, and their several nests, he carefully attended. The worms and caterpillars, washed in the spring-freshets from the meadow-grass, filled his soul with hope at the profuse vermicular expansion of Nature." Thoreau took on his identity, in one sense, from the systole and diastole of his natural surroundings. The fluidity of that identity was his principal trait, because through this he could, almost immediately via his Journal, transfer to the pulse of his writing the transitoriness of nature and its progressions. Like the bees he recorded which had arrived at the spring plants with unerring instinct prior to his own observations, he sought out nature in its formative metamorphoses, so that he could "make a chart of our life — know how its shores trend — that butterflies reappear and when — know why just this circle of creatures completes the world. Can I not by expectation affect the revolutions of nature — make a day to bring forth something new?"(PJ4:468). The rhetorical overstatement is part of Thoreau`s strategy for diminishing the human species, perhaps even for questioning the ideological aspirations of the American Revolution, and certainly for ironically deflating the ego. But it is also part of his strategy for defining human life, taking as his material his fellow Concord inhabitants and, above all of course, himself. Almost at the very inception of Walden, Thoreau sketches the main theme on which there will be multiple variations, suggesting the citizens of Concord are more puzzling than appears at first sight for they have "appeared to me to be doing penance in a thousand remarkable ways. What I have heard of Brahmins sitting exposed to four fires and looking in the face of the sun; or hanging suspended, with their heads downward, over flames;...or measuring with their bodies, like caterpillars, the breadth of vast empires; or standing on one leg on the tops of pillars - even these forms of conscious penance are hardly more incredible and astonishing than the scenes which I daily witness" (4). In modern literature, the "hanging suspended" brings to mind the pupal stage of Kafka`s Gregor Samsa in The Metamorphosis. More directly, it recalls Thoreau`s reflection in A Week that "When I go into a museum, and see the mummies wrapped in their linen bandages, I see that the lives of men began to need reform as long ago as when they walked the earth" (Week, 124). The act of mummification is a ritualistic interpretation of the chrysalis stage of an insect, as Nabokov ironically projected in Invitation to a Beheading. (For more on this, see my Metaphysics.) The Brahmins distinguish themselves from the domesticated house-dwellers of the Western world who are like "My gay butterfly entangled in a web" (66). England represents this form of atrophy par excellence, "an old gentleman who is travelling with a great deal of baggage, trumpery which has accumulated from long housekeeping, which he has not the courage to burn; great trunk, little trunk, bandbox and bundle" (66). The pioneering and revolutionary American character is, like Melville`s Queequeg, "a creature in the transition state - neither caterpillar nor butterfly." Joyce Carol Oates has evoked the shifting, even shiftiness, of Thoreau`s persona in his perception of external nature. Projecting him as "the supreme poet of doubleness, of evasion and mystery"(ix), she argues that "if there is a self it must be this very shifting of perspective, this ceaseless transformation and metamorphosis"(xi). At root is a duality of vision that the Italian writer, Cesare Pavese, noted in the American outlook - "a sort of double vision through which from the single object of the senses, avidly absorbed and possessed, there radiates a sort of halo of unlooked-for spirituality." Perry Miller had defined the ambiguity, which at times spills over into confusion, in an address to the Thoreau Society in 1960. He argues that the author at times demands a scientific view of nature, but at others acknowledges "a wise purveyor [who] has been there before me:" "If at one and the same time Nature is closely inspected in microscopic detail and yet through the ancient system of typology makes experience intelligible, then Thoreau will have solved the Romantic riddle, have mastered the Romantic [today`s Postmodern] Irony." Likewise R.W.B. Lewis located both Emerson`s and Thoreau`s sense of irony as deriving from the double consciousness of Plato and Coleridge, so that the American writers "searched, in their separate ways, for the spiritual analogies which completed the doubleness of nature." Ultimately this derives from the seventeenth century disruption of the direct relation between word and thing, signifier and signified, the visible and the unseen. On a larger scale, the whole of modernism and postmodernism stem from these rifts, running from Don Quixote to Richard II, from Nabokov to Fowles and Alastair Gray. For the author, doubleness has its tactical equivalent in duplicity, allowing Loren Eiseley to classify him as "a double agent" in his approach to nature, and Foucault to define this riven individuality as "a strange empirico-transcendental doublet."10 All this is not as remote from his Reform Papers as may appear at first, for at basis Thoreau is attacking the legal concept of `person,` inextricably associated with the definition of `property` in the judicial code, and also with fixed, established perception. Early on he makes this quite evident: "I see young men, my townsmen, whose misfortune it is to have inherited farms, houses, barns, cattle, and farming tools; for these are more easily acquired than got rid of. Better if they had been born in the open pasture and suckled by a wolf, that they might have seen with clearer eyes what they were called to labor in" (5). This is part and parcel of his thoroughly ambiguous attitude to human social roles, somewhat on the lines of Emerson`s "people seem sheathed in their tough organization." He is a harbinger of those arguing the bankruptcy of person-oriented thought, though Benjamin Constant - whom he read and in whom Orestes Brownson, an early mentor of Thoreau`s and perhaps the only one beside Emerson, was especially interested - had anticipated this phase of literary-philosophical criticism. Louis Aragon finally formulates it most dramatically in his Le Paysan de Paris where he pronounced: "Il est trop tard pour vous, Messieurs, car les personnes ont fini leur temps sur la terre. Poussez à sa limite extrème l`idée de destruction des personnes, et dépassez-la." And then Norman O. Brown, in an entirely different context, elucidates the process that will unify Walden - the long extended fourfold structure, related to insect metamorphosis, of individual evolution. In his inspirational masterpiece, Love`s Body, Brown identifies - "Larva means mask; or ghost. Larvatus, masked, a personality - larvatus prodeo (Descartes); it also means mad, a case of demoniacal possession. Larva is also `the immature form of animals characterized by metamorphosis`; in the grub state; before their transformation into a pupa, or pupil; i.e., before their initiation." Apuleius has a related cluster of words in his On the God of Socrates: "Now, of these Lemures, the one who, undertaking the guardianship of his posterity, dwells in a house with propitious and tranquil influence, is called the `familiar` Lar. But those who, having no fixed habitation of their own, are punished with vague wandering, as with a kind of exile, on account of the evil deeds of their life, are usually called `Larvae`" So larva is not only person, but one cast into the wilderness outside the bounds of established society, one of Thoreau`s "portionless, who struggle with no such unnecessary inherited encumbrances" (5). Such are, as Thoreau puns later, creatures of "Extra vagance," those who are analogous to the author who fears "lest my expression may not be extra- vagant enough, may not wander far enough beyond the narrow limits of my daily experience, so as to be adequate to the truth of which I have been convinced" (324). Here is the very root of the profound conflict between the perspective of Walden and that of the Journal, between the individual in the process of maturation and the observing individual already fully formed. For Walden offers a unique plan of regeneration in Western literature, and it portrays the natural historian as having to prepare himself for the settled observations that constitute the Journal. Taking his cue from nature, he matures in step with it. Darwin provides no such parallel drama. For this is the essential starting-point of true growth in the Thoreauvian world-view, one in which on moving house furniture can be cast off as "exuviæ" (66), or in which the custom of the Mucclasse Native Americans, first noted by William Bartram, should be adopted of the four-day "busk" when the ritual "semblance of casting their slough annually" (68) is acted out. His opening chapter is by no means the straightforward `Economy` that his title suggests, but rather an ironical `anti-economy` where poverty and propertylessness are the virtues. The human species is not an organic growth in the way of a foliage: "We don garment after garment, as if we grew like exogenous plants by addition without" (24). The quadruple (philological) movement from ovum to larva, thence to pupa or chrysalis, and finally to psyche, or butterfly, is related to the spiral of (self-)education and maturation hypothesized as a universal plan of regeneration in Walden, and realized by the author. His self-regeneration is propelled linguistically. Philip Gura has observed that Thoreau demonstrates language is not a set of arbitrary signs but arises "organically from the very core of the empirical objects themselves, thus offering men profound clues to the organization of the universe." And we might add in Transcendentalist mode, to the growth of the human soul. Thoreau never quite made up his mind as to his attitude to science - or with regard to Transcendentalism. Paradoxically the more scientific his method became, the less enamoured he became towards the burgeoning profession. His concept of the scientist as hero faded and as Robert J. Scholnick observes: "In retrospect, it is notable that these years from 1839 to 1842, marking Thoreau`s most straightforward, least qualified admiration for science, are the years in which Thoreau least identifies his life and work with science. As he becomes more and more involved in science itself, his view of it will become correspondingly more complex." Partly this was because of the dissection processes of science, where the quick of relations with the living creatures is betrayed. Emerson, of course, expressed a transcendentalist protestation at this with his projection of turtles holding "an indignation meeting...with Chelydra serpentina marching at the head, and `Death to Agassiz!` inscribed on their shields." And acquaintance, Edward S. Hoar, remembered studying birds with Thoreau when he "would lie and watch the movements of birds for hours, and so get the knowledge he wanted. He used to say that if you shot the bird [as John Burroughs would] you only got a dead bird anyway; you could make out a few parts in anatomy or plumage...but you couldn`t see how the bird lives and acts." Some twenty years later, in February 1860, Thoreau offers a more mature assessment of the limits of scientific discourse, by now finding "our science, so called, is always more barren and mixed up with error than our sympathies are." Likewise although he generally accepts Darwinian theory, he often writes reflecting the transitional time in science he was working in. At the end of a section of the Journal in which he has been describing the activity of worms gnawing wood, he suddenly bursts out: "Men of science, when they pause to contemplate `the power, wisdom, and goodness` of God, or, as they sometimes call him, `the Almighty Designer,` speak of him as a total stranger whom it is necessary to treat with the highest consideration. They seem suddenly to have lost their wits." Thoreau always retained a belief, even if at times residual, that God`s mind lay behind nature, and the world of the microscopic, the insect, crystallized his perceptions on this - "What kind of understanding was there between the mind that determined that these leaves should hang on during the winter, and that of the worm that fastened a few of these leaves to its cocoon in order to disguise it?" As a writer he was concerned to capture - in words - the miraculous detail of nature. It is an issue of language for "The man of Science who is not seeking for expression but for a fact to be expressed merely - studies nature as a dead language -" It is the task of the poet-naturalist (William Ellery Channing`s phrase for Thoreau) to mythologize nature, to present as what Laura Dassow Walls via Humboldt defines as phenomena, to create it for the reader as the point of intersection between subject and object, neither one nor the other but a living synthesis. (all page numbers refer to the Princeton edition of Walden, available in paperback, with an Introduction by Joyce Carol Oates) Thoreau`s Vision of Insects is essential reading for all interested in Henry Thoreau, this is the first full account of the insects in his writing. Drawing on his own experience in the fields of bio-diversity and entomology, Dr. David Spooner identifies many of the insects in Thoreau`s work. This is a book that will revolutionize the way we read Walden so that the celebrated beautiful bug at the end of the book becomes an integral part of Thoreau`s lifetime of entomological observation. The writer`s vision is a perfect fusion of science and art. To Order please contact: www.xlibris.com/ThoreausVisionofInsects David Spooner has lived in Dunfermline, Scotland for the past 25 years. He has served on the National Biodiversity Committee for Scotland, and was recently an adviser to the US Fish & Wildlife Service in the successful rescue of the El Segundo blue butterfly at the dunes by LA Airport. Founder of Butterfly Conservation, East Scotland, two of his major books are: The Metaphysics of Insect Life (1995), and The Poem and the Insect: Aspects of Twentieth Century Hispanic Culture (1999). One of the things he is arguing in all his writing is the way insect processes - particularly metamorphosis - are much more crucial to human thought than evolutionary theorists have accepted up to now. We have been stuck at the fact of the evolution of the human from the ape, but the key is the influence of the metamorphic principle upon human creativity. To order his earlier books below please contact: www.univpress.com The Poem & the Insect: Aspects of Twentieth Century Hispanic Culture (1999, 2002) The Metaphysics of Insect Life (1995) for more on the ideas of David Spooner on Insects and Evolutionary Theory, please go to www.davidspooner.freeservers.com ©David Spooner April 2003
THE PRESENT STATUS OF SCOTLAND`S RAREST BUTTERFLIES in memory of Dr. John Berry, Scottish naturalist extraordinary and lepidopterist for all seasons by David Spooner published in the Forth Naturalist & Historian 2002 The lepidopterist and novelist Vladimir Nabokov wrote (Boyd, 529) that he could never distinguish between the aesthetic pleasure a butterfly gives, and the scientific task of identifying it. Butterflies with their sensitivities to climatological and geophysical data offer much information about the state of the planet, being so immediately responsive to change. Warmer autumns and winters have resulted in a proliferation of scrub and grasses (Bowles 2001, 128 and 2002, 210), while foot-and-mouth disease in 2001 reduced the suitability of many habitats due to lack of grazing. Chequered SkipperConsideration of Scottish butterflies begins with the Chequered Skipper (Carterocephalus palaemon), a butterfly that is mainly confined to Scotland despite attempts to re-establish it in England, where it died out in 1976 and where viable breeding is still doubtful. Remarkably this Skipper was only discovered in Scotland in 1939 in a region centred on Fort William in oak woodlands on the flood plain of River Lochy. The Scottish Wildlife Trust undertook a number of surveys in the 1970s uncovering many new localities, at which point the Nature Conservancy Council extended monitoring, and finally Butterfly Conservation came up with a comprehensive Species Action Plan. It is now known in some 50 locations, all in the north west of Scotland, and is relatively stable. It is a Red Data species in Britain and classified as a vulnerable species in Europe, despite its recent expansion in Hungary and Italy. The major threats to the Chequered Skipper are overgrazing of larval habitats, and dense scrub leading to a shading of adult habitats. As the Millennium Atlas of Butterflies puts it: Although the distribution appears stable in Scotland, there are serious concerns about the changing management of the butterfly`s woodland edge habitats. Increased browsing by deer is preventing the regenerating of native woodland in many areas and several recent forestry initiatives include the fencing of woods against deer. Although this encourages natural regeneration of trees, it can lead to the rapid loss of open space, including breeding areas of the Chequered Skipper. This situation is known to be adversely affecting the butterfly at a number of sites, including some nature reserves. Greater effort should be made to incorporate the needs of insects that require open spaces into such schemes, possibly by introducing some rotational clearance of woodland and maintaining open spaces in potential breeding areas (Asher et al 2001, 55).The caterpillars of the Skipper require areas on flushed soils and scrub, while the adult looks for the richer peat sites. The lower poorly drained peat is unsuitable for larvae, and the tree line soon obscures adult flight paths. The larvae need open grassland dominated by the food plant purple moor-grass (Molinia caerulea) growing on wet but not waterlogged soil with bog-myrtle (Myrica gale) and birch. (In England it was found on false-brome (Brachypodium sylvaticum)). Adult males require wet tussocky grass and open scrub, while the females look for open bracken, herb-rich meadow areas moving toward bog where the moor-grass is plentiful. The palaemon caterpillar wraps itself in the grass during the summer and hibernates during the winter. There is one generation a year with adults flying from the 3rd week of May until the end of June, occasionally into early July. Eggs are laid singly on the foodplant, and the larvae subsequently live within tubes formed by spinning together the edges of a leaf. These caterpillars have a long gestation period after feeding in November, and recent research shows survival rates are higher where the foodplant remains green into autumn. These grow on exceptionally aerated soils that are rich in nitrogen and deep green. Feeding signs usually occur halfway up the Molinia blades, with notches on either side. The larvae activate in April, and pupate without further feeding. On emergence the males are territorial and depend on airspace 3-4m across. Low vegetation and a number of taller perches are important to maintain high temperatures and clear vision. Females look for large amount of nectar and may congregate in patches of bugle (Ajuga reptans) and marsh thistle (Cirsium palustre). Sheep-grazing and rapid tree growth can very easily lead to local extinction. It has disappeared from Glen Nevis because of over-grazing. As so often, complex biodiversity comes into play, with serious conflicts of species and land-use interests. However joint action is being carried by Butterfly Conservation with Scottish Hydro-Electric whose coppicing of wayleaves for power lines creates clearing where nectar plants and grasses can grow. Large Skipper (with acknowledgment to www.scottishbutterflies)The Large Skipper (Ochlodes venata) is confined to the south west of Scotland. While it is widespread in England and absent from Ireland, it has a foothold in Ayrshire and Dumfries and Galloway. Speculation that it is spreading eastwards is not borne out by recent observations, but its presence in Scotland is stable. As George Thomson reported in his classic conspectus:Mosses, damp meadows, coastal cliffs, rough grassy slopes and open woodland are the places in which this species may be found. It is fond of feeding from flowers, but more often darts about the low plants, settling with its wings in the characteristic half-open position (Thomson 1980, 65). It is univoltine. Adults appear in late May and numbers peak in July. In the sun, males patrol in mid and late morning seeking mates. Earlier in the morning and during the afternoon, the male will perch and await passing females. Eggs are laid singly on the undersides of cock`s-foot (Dactylis glomerata), and purple moor-grass or false-brome. The caterpillars hide in tubular grass constructions they create by joining the edges of a leaf stalk with silk. They overwinter in this hibernaculum before pupation and emergence in late May. Dingy SkipperThe Dingy Skipper (Erynnis tages) is, as its name suggests, quite inconspicuous in its browns and greys. It is the most widespread Skipper in England and Ireland, and has a resemblance to the Grizzled Skipper (Pyrgus malvae) which is however absent from Scotland. The Dingy Skipper is confined in Scotland to a few colonies in the north east, mainly on coastal dunes between Inverness and Banff such as the Spey Bay SWT reserve, together with separate groupings in Dumfries and Galloway. At present it has no statutory protection though, like other butterflies unsecured in the rest of the UK and the Republic of Ireland, it is protected in Northern Ireland under the Wildlife (N. Ireland) Order (1985). In the north east of Scotland, its habitats are generally dunes and undercliffs, though it has been reported inland in Moray, while in the south west it also flies along woodland tracks, clearings and wastelands. Could there possibly be subtle genetic differences between butterflies at these distant sites? Common bird`s-foot-trefoil (Lotus corniculatus) is the Dingy Skipper`s main foodplant. Eggs are laid on the longest shoots of the larger plants in sheltered positions. The caterpillars create a tent by drawing leaves together, and then feed through the summer months, spending the winter in a more elaborate hibernaculum. Pupation occurs in spring within this covering, and the imago emerges during May and flies into June. It can be seen basking in the sunshine, but at night like the moths to which the Skippers are closely related, it will almost wrap its wings around dead flowerheads in a way unique for indigenous butterflies. There appear to have been some losses since the 1980s, though its numbers are stable overall. Many of the colonies are very small, containing fewer than 50 individuals at their peak. Over-shading by trees and scrub growth are constant threats to its numbers, together with either over- or under-grazing. Natural selection may not be on the side of some of these rare butterflies. The fact is that they are pernickety creatures, and the Dingy Skipper like the rest of the rarities requires stronger statutory protection. Small BlueThe Small Blue (Cupido minimus) has a sparse population extending from Hawick in the south with a huge gap until Moray and Angus coastal areas, then running sporadically as far as the northernmost north east coast. The Hawick sites have been continually threatened by overgrown salix, mediocre early summers and sparse plantfood, and are now probably devoid of the butterfly, despite conservation work. It is now an insect of the eastern coast beyond the central belt. There is a single plantfood, kidney vetch (Anthyllis vulneraria), and the caterpillars feed inside the flowerheads on anthers and seed. They are, like the Orange-tip young, cannibalistic and eat any younger larvae encountered. Scarcity of the foodplant on a habitat thus soon leads to extinction. Winter is spent in crevices in the earth or beneath moss. Males tend to group on the edges of breeding grounds on shrubs, and this can be easily observed at the site on Seaton Cliffs in Angus. The Millennium Atlas remarks:Both larvae and pupae have structures that attract ants and in continental Europe they are usually tended by ants throughout their development. However, detailed observations in Britain have rarely found ants in attendance, possibly because few native ant species forage high up on the flower-heads. There have been very few observations of the overwintering larvae and pupae but they are possibly attended by ants (Asher et al 2001, 145-146). The relationship of C. minimus with ants, then, remains open to further investigation. (I was recently an adviser to the U.S. Fish & Wildlife Service, and this symbiotic relation between ant and blue butterfly proved the crux in our rescue of the El Segundo Blue Butterfly (Euphilotes battoides allyni) on the dunes by Los Angeles Airport). Although the Small Blue`s flight period begins earlier in England, in Scotland it flies anytime between the last week in May through June, the time-span lasting only 2 weeks. The shimmer of blue is quite distinct despite their smallness, although the female is less suffused with blue than the male. Unlike most other butterflies, their colouring is not an effect of pigmentation. Instead light is refracted on scales layered like tiles on their wings. The Small Blue is listed in Schedule 5 of the 1981 Wildlife & Countryside Act which states It is a criminal offence to sell, offer or expose for sale, or possess or transport for the purposes of sale, whether alive or dead, any wild specimen and parts or derivatives of them, or for anyone to publish or cause to be published any advertisement indicating or suggesting that they buy or sell such things, without a license.It is a criminal offence to kill, injure or take the species from the wild; possess any live or dead wild specimen, or any part of, or anything derived from them; sell, offer or expose for sale, or possess or transport for the purposes of sale, whether alive or dead, any wild specimen and parts or derivatives of them; or for anyone to publish or cause to be published any advertisement indicating or suggesting that they buy or sell such things, without a license. Despite the recent extinction of this butterfly from Dumfries and Galloway and probable extinction at Hawick, the survey in preparation of the 2001 Atlas revealed 109 additional 10km squares since the 1970-1982 survey, including many new ones in Scotland. Northern Brown Argus (www.scottishbutterflies.)The Scotch White Spot is the almost perfect name for what is presently known as the Northern Brown Argus (Aricia artaxerxes), since it is distinguished from the mainly English plain Brown Argus (Aricia agestis) by the white spot in the middle of the forewing, and is a butterfly predominantly of Scotland. As George Thomson declared in The Butterflies of Scotland, “the Scotch Brown Argus, Northern Brown Argus or Scotch White Spot has the honour of being the first butterfly to be recorded from Scotland in literature (Thomson 1980, 116-117).” Where it occurs in the South, in County Durham, its spot is usually dark brown or black. The situation has, however, recently been complicated by genetic studies on a late flying Argus in South Derbyshire in 1999, which was shown to be a hybridization of the Northern Brown and Brown Argus!The foodplant of this butterfly is common rock-rose (Helianthemum nummularium), usually but not always in lightly grazed sward. Typical sites are rocky slopes, either inland or coastal. While in northern England it usually occurs on limestone pavement and outcrops, in Scotland it also occurs in predominantly neutral or even acidic soils where common rock-rose is able to grow if there is some calcareous influence through weathering or flushing (Asher et al 2001, 157). However these sites, south-facing and sheltered, are always well-drained. Of 13 colonies studied in 1986, only 3 were found on calcicolous grassland, 4 being neutral and 5 acidic (Clunas 1986). George Thomson observed in his book that the species appeared in the second week of July on the east coast of Scotland as opposed to earlier flight in the west (Thomson 1980, 123). However increases in cloud-cover in the west over the past two decades means that the Northern Brown Argus can now be seen as early in the east as in the south-west, which is to say mid-June at Seaton Cliffs. Although its flight is usually over by mid-August, it was recorded by Keith Bland at Fealar Gorge, west of Braemar on 22nd September, 1997. Eggs are laid on the upper side of a leaf of H. nummularium, where they are clearly visible and easily counted. They hatch after 6-15 days. The caterpillars do not eat the eggshell, but move to the underside of the leaf where they pierce the epidermis and feed on the interior, leaving the surface intact. They start basking in spring, pupate after the 5th or 6th instar in late May, and while pupating lie on the ground attached to vegetation by silk threads. The pupa hatches after some three weeks. In late afternoon and early evening, small groups of the imago can be seen resting together on long grasses or in flowerheads. A. artaxerxes had been under-recorded and research for the Atlas almost doubled the number of 10km squares where it was found. It appears in the Borders, along the coast of Dumfries and Galloway, and then has an eastern distribution to south-east Sutherland with strong populations in Perthshire and northern Tayside. Asher and co-authors observe that “it has undoubtedly declined in the south of Scotland, especially in the Borders and around Edinburgh, but further surveys are needed to assess its true status (Asher et al 2001, 158).” However overall it is stable in numbers, even though it is not a highly adaptable insect like the freer flying countryside species. It remains extremely sedentary and so has limited colonizing ability. This Argus requires light grazing of the sward, and where selective spring and autumn grazing has been introduced as it has at St. Abb`s Head NNR since 1992, its numbers have increased dramatically. Pearl-bordered FritillaryThe Pearl-bordered Fritillary (Boloria euphrosyne) feeds on marsh violet (Viola palustris) in Scotland, but also on common dog-violet (Viola riviniana). It is restricted to short, sparse vegetation with a very warm microclimate where the larvae feed on the violets. Temperature must be exactly right among the bracken and leaf-litter (33C) for egg-laying. Unlike its close relative the Small Pearl-bordered Fritillary (Boloria selene), it needs well-drained grassland habitats with decayed bracken, and deciduous woodland. The decline in coppicing has led to an increase in shade and subsequent decline, especially in the south of Scotland. Over the whole of Britain it has declined by 60% in 30 years. However the re-planting of woods, often with non-native conifers, provided new habitats for the butterfly during the 1950s and 1960s - though even these plantations have now grown dense and shady. The Pearl-bordered Fritillary requires a mosaic of branches and grass which does not become overgrown, and hence relies on the activity of stock and other animals. Eggs are laid on dead branches and leaf litter. Larvae bask on the litter, and will move many metres for suitable sites and foodplants. In Scotland, euphrosyne tends to disperse into metapopulations, similar to the American source-and-sink habitats, often thinly spread over a relatively wide area. The pupae lie in the litter and emerge in late May and June. There have been other recent losses in Dumfries and Galloway, but in its strongholds in Argyll, the Highlands, west Aberdeenshire and northern Perthshire, it remains stable. As already suggested, there often arises a conflict of ecological interests. The extension of native woodland and the growth of shadow, together with fencing, has entailed a loss of deer grazing to keep the swards short. The prospering of this butterfly - which is especially spectacular in its colouration in Scotland - remains a formidable challenge. Marsh FritillaryThe ecology of the Marsh Fritillary (Eurodryas aurinia) in Scotland is even more demanding than in England or Wales, generally preferring shorter vegetation. Colonies occur on areas of tussocky grassland dominated by Molinia caerulea, and associated with flat areas of Sphagnum supporting its abundant foodplant, devil`s-bit-scabious (Succisa pratensis). The largest colonies are on Islay where grasses are virtually absent and the habitat relatively poor, but where the sites are lightly grazed by sheep or cattle, or both. Over-heavy or under-grazing will not suffice. As a Scottish Natural Heritage Report remarks: In Scotland, as in England, E. aurinia has declined from the east of the country, and there are extinct sites in Grampian, Inverness, Strathclyde, Glasgow and the Clyde valley, the Borders and Dumfries & Galloway [and we may add Perthshire at Logiealmond and Kinfauns], the majority occurring before 1939. Current known distribution is confined to the Strathclyde region and focussed on the Taynish peninsula, north along the coast to just above Oban and on Lismore, and on the Hebridean islands of Islay, Mull and Jura (Ravenscroft and Gaywood 1996, 3). It is now extinct in the eastern half of Britain, though I recently visited an introduced colony in Lincolnshire which continues to flourish after some years, and this suggests that a little imagination goes a long way where habitats are propitious for re-introductions. Eggs can be laid in large batches up to 350 with less in later batches, but they are smaller clusters in Scotland. The larvae are gregarious and spend much of their time in a communal web; these webs are found on shorter scabious rosettes here than in England and Wales. They overwinter in their 4th instar in a small hibernaculum close to the ground, and emerge in late winter or early spring to bask together thus raising body temperatures. They begin to disperse in their 5th instar, and in their 6th and final instar become solitary. Then they pupate in low grass or tussocks and leaf litter. The peak flight period is the end of May to mid-June. By mid-July they are gone. Marsh Fritillaries undergo great fluctuations in numbers, with periodic crashes and expansions. The years 1982-1985 were a time of expansion, followed by more lean years in core sites. The reverses are connected to variations in food supply, weather and parasitism of the caterpillars by braconid wasps of the genus Cotesia. There is considerable movement of populations of this butterfly, with patterns of dispersal, new colonization and local extinctions characteristic of metapopulations. The Action Plan for E. aurinia reports that although there are 35 definite sites in Scotland, “the situation is not as healthy as might be assumed from these figures as most colonies are small and their extinction rate is high (Barnett and Warren 1995b, 10).” Clearly this is a seriously endangered butterfly, and has the highest level of legal protection. An important initiative in September 2001 brought together farmers, landowners and conservationists on Islay to discuss the needs of farmers and the butterfly. The farmers are crucial to the survival of this Fritillary, dependent as it is on low-intensity cattle- and sheep-grazing pastures. The WallThe Wall (Lasiommata megera) is limited in its Scottish range, quite like the Large Skipper, to the coastal areas of Ayrshire, Dumfries and Galloway. There has been a sprinkling of sightings further up the west and east coasts. It has been spotted at St. Abb`s Head, and I myself saw one flattened against a wire mesh fence on the cliffs above St. Andrews Bay in May 1993, clearly a detained voyager on a blustery southern wind. Its distribution in England is narrowing in the south, and moving northwards, but there is little evidence that it is making much headway beyond its southwestern strongholds within Scotland. Mountain RingletThe Mountain Ringlet (Erebia epiphron scotica) was one of the first butterflies, along with Aricia artaxerxes and possibly Erebia aethiops, to colonize in the Late Glacial period. It is now confined to two of the areas occupied at that time, the Scottish Highlands and the Lake District, and is the only montane butterfly in the UK. A recent report has cast doubt on its ability to survive beyond the year 2050 if present levels of increases in climate warming continue. Studies at Ben Lawers NNR suggest a 1C or 2C rise in mean temperatures would reduce suitable habitat by 40%, but its adaptability may be being underestimated. It has, after all, millennia of experience in Scotland! The survey for the 2001 Atlas failed to re-record E. epiphron scotica in 12 10km squares where it was found in 1970-1982, but discovered the butterfly in 22 new 10km squares.This is an increase of 34%. Weather conditions are, of course, a major factor in the flight of this Ringlet, and I recorded excellent numbers in the mountains above Kinloch Rannoch in 2000, followed by none at all in 2001. There is almost certainly a two-year cycle allowing it to circumvent poor seasons, and maybe there is even a three-year seasonal cycle. The flight period is relatively short occurring any weather-suitable time between June and early August in Scotland. It lasts some 2-4 weeks, and the peak is quickly reached after emergence. Adults can fly in overcast and rainy conditions so long as the temperature is 13-14C. Its primary foodplant is probably mat-grass (Nardus stricta), and that `probably` indicates the difficulty of studying the ecology of this butterfly, as anyone who has tried to monitor eggs and larvae can testify. Indeed one Report has surmised that “caterpillars may be more abundant at nights (Pearce et al 1999, 9).” Larvae do feed at night on Sheep`s-fescue (Festuca ovina), dropping to the base of tussocks by day. They hibernate in late August or September and emerge in spring. The imago takes nectar from whatever flowers are available. The Scottish Mountain Ringlet is larger and often has brighter colouration than the Lake District species (E.epiphron mnemon). Colonies occur between 350-900m and occasionally over 1000m, but most are found between 450-800m (Thomson 1980, 173). They are usually south-facing in Scotland, while those in the Lake District have various aspects that include northerly. Populations shift slightly from year to year, and depend upon some sheep grazing to keep the turf at a required height. Adults fly close to the ground with males more active, moving as far as 200m per flight. The putative foodplant, mat-grass, is abundant on 99% of mountains in the UK. There are some other rare butterflies to be seen in Scotland, but most are not established here. The Camberwell Beauty (Nymphalis antiopa) was recorded in Sutherland and Shetland in 1995, and sporadically in 1996 as a result of a strong airflow in high-pressure conditions coming from Scandinavia. Clouded Yellow (Colias croceus) is quite a regular visitor to Scotland with occasional invasions of large numbers as in 1992 when they swept through the Central Belt. And there were considerable numbers in 2000. The Millennium Atlas foresees the possibility of this species establishing permanent populations as a result of global warming (Asher et al 2001, 95). The Holly Blue (Celastrina argiolus) is a desultory visitor seen occasionally at Rockcliffe in the southwest, and one in the East Neuk in 1998. The Brimstone (Gonepteryx rhamni) is a very rare sight in Scotland, though I have seen one outside Dunning, which was almost certainly a home-bred release. The prolific Buckthorn running from Kinshaldy towards St. Andrews could, perhaps, be seriously considered for the introduction of this butterfly by SNH. True, the buckthorn is north-facing, but the Brimstone is a resourceful butterfly which can fly 11 months of the year. And finally there is the Comma (Polygonia c-album), perhaps a resident insect already. Over the past 5 years, it has expanded into the Borders and Lothian, and with its northerly migration, promises to establish itself firmly over this decade. It was spotted again at Dirleton, East Lothian, in 2002, and I recorded one at Swinton, Berwickshire. They are sporadic, but clearly getting a foothold - or winghold. The outlook for countryside species like c-album within Scotland is clearer than for the habitat-specialist species. The progress of the Orange-tip (Anthocharis cardamines) may be a prelude to the progress of the more adaptable countryside butterflies. It has increased in Scotland by 100% over the past 30 years. References and further reading Asher, Jim et al (2001). The Millennium Atlas of Butterflies in Britain and Ireland. Oxford University Press. Barnett, L.K. and Warren, M.S. (1995a). Marsh Fritillary Species Action Plan. Butterfly Conservation, Wareham. Barnett, L.K. and Warren, M.S. (1995b). Pearl-bordered Fritillary Species Action Plan. Butterfly Conservation, Wareham. Bayfield, N. et al (1995). Small Mountain Ringlet project: field studies, rearing programme and questionnaire survey 1994-1995. Institute of Terrestrial Ecology. Bourn, N.A.D., Jeffcoate, G.E. and Warren, M.S. (2000). Dingy Skipper Species Action Plan. Butterfly Conservation , Wareham. Bourn, N.A.D. and Warren, M.S. (2000). Small Blue Species Action Plan. Butterfly Conservation, Wareham. Bowles, Nick (2001). Wildlife Reports: `Butterflies.` British Wildlife, 13:2. December 2001. Bowles, Nick (2002). Wildlife Reports: `Butterflies.` British Wildlife, 13:3. February 2002. Boyd, Brian and Pyle, Robert Michael (2000). Nabokov`s Butterflies: unpublished and uncollected writings. Allen Lane, London. Brown, Lesley (2000). Butterflies of the Forth Valley. CARSE, Stirling. Butterfly Conservation News, 1997-2002. Clunas, A. (1986). The biology and habitat requirements of Aricia artaxerxes Fabricius (Lep: Lycaenidae). Thesis, University of Edinburgh. Dennis, R.L.H. (1977). The British Butterflies. Classey, Oxford. Emmet, A.M. and Heath, J. (1989). The Moths and Butterflies of Great Britain and Ireland. 7 part 1 Hesperiidae to Nymphalidae. Hartley Books, Colchester. Fox, R. et al (2001). The State of Britain`s Butterflies. Butterfly Conservation, CEH & JNCC, Wareham. Hancock, E.G. (1998). Insect Records for 1996. Glasgow Naturalist, 23: part 3, 27-30. Hancock, E.G. (1999). Insect Records for 1997. Glasgow Naturalist, 23: part 4, 55-58. Hancock, E.G. (2000). Insect Records for 1998 and 1999. Glasgow Naturalist, 23: part 5, 48-52. Hancock, E.G. (2001). Insect Records for 2000. Glasgow Naturalist, 23: part 6, 53-56. Heath, J., Pollard, E. and Thomas, J.A. (1984). Atlas of Butterflies in Britain and Ireland. Viking, London. Higgins, L.G. and Riley, N.D. (1970). A Field Guide to the Butterflies of Britain and Europe. Collins, London. O`Keefe, J. (1995). Habitat Management of Marsh Fritillaries (Eurodryas aurinia). M.Sc. Thesis, University of Edinburgh. Pearce, I.S.K. et al (1999). Scottish diurnal lepidopteral project; sites, protocols, and distribution. SNH research, survey and monitoring report, no. 113. Pollard, E. and Yates, T.J. (1993). Monitoring Butterflies for Ecology and Conservation. Chapman & Hall, London. Ravenscroft, N.O.M. (1996). The Chequered Skipper. Butterfly Conservation, Dedham. Ravenscroft, N.O.M. and Warren, M.S. (1996a). Chequered Skipper Species Action Plan. Butterfly Conservation, Wareham. Ravenscroft, N.O.M. and Warren, M.S. (1996b). Mountain Ringlet Species Action Plan. Butterfly Conservation, Wareham. Ravenscroft, N.O.M. and Warren, M.S. (1995). Northern Brown Argus Species Action Plan; Second Draft. Butterfly Conservation, Wareham. Ravenscroft, N.O.M. and Warren, M.S. (1996c). Northern Brown Argus Species Action Plan. Butterfly Conservation, Wareham. Ravenscroft, N.O.M. and Gaywood, M.J. (1996). The status and habitat of the marsh fritillary butterfly in western Scotland (SNH research, survey and monitoring report, no. 21). Ravenscroft, N.O.M. (1994a). The Ecology of the Chequered Skipper Butterfly Carterocephalus palaemon in Scotland. 1. Microhabitat. Journal of Applied Ecology, 31: 613-622. Ravenscroft, N.O.M. (1994b). The Ecology of the Chequered Skipper Butterfly Carterocephalus palaemon in Scotland. 2. Foodplant quality and population range. Journal of Applied Ecology, 31: 623-630. Ravenscroft, N.O.M. (1994c). The Feeding Behaviour of Carterocephalus palaemon (Lepidoptera: Hesperiidae) Caterpillars: does it avoid host defences or maximize nutrient intake? Ecological Entomology, 19: 26-30. Spooner, D. (1997). The Chequered Skipper and Butterfly Conservation in Scotland. Forth Naturalist and Historian, 20: 57-60. Thomson, G. (1980). The Butterflies of Scotland. Croom Helm, London. Thomson, G. (1976). Our `Disappearing` Butterflies. Forth Naturalist and Historian, 1: 89-105. Thomson, G. (1977). Migrant Butterflies of Central Scotland. Forth Naturalist and Historian, 2: 49-53. Warren, M.S. (1991). The Chequered Skipper, Carterocephalus palaemon in Northern Europe. Butterfly Conservation, Wareham. Warren, M.S. (1992). Britain`s Vanishing Fritillaries. British Wildlife, 3: 282-296. Warren, M.S., Clarke, S. and Currie, F. (2001). The Coppice for Butterflies Challenge: a targeted grant scheme for threatened species. British Wildlife, 13: 21-28. Warren, M.S. et al (2001). Rapid responses of British butterflies to opposing forces of climate and habitat change. Nature, 414: 6859, 67-70. Warren, M.S. (1994). The UK status and suspected metapopulation structure of a threatened European butterfly, the marsh fritillary Eurodryas aurinia. Biological Conservation, 67: 239-249. Wheeler, A.S. (1982). Erebia epiphron Knoch (Lep., Satyridae) reared on a two-year life cycle. Proceedings of the British Entomological and Natural History Society, 15: 28. Willcox, Neil (1999). Butterfly Havens. Scottish Wildlife, 37: 16-18.
GLOSSARY biodiversity The variety of life on the planet, or any given part of it. There is no finer account than Edward O. Wilson (1992). The Diversity of Life . Harvard University Press paperback. colony A group of individual butterflies occurring in a distinct habitat apparently separated from other groups of the same species. coppicing A traditional method of management of broad-leaved trees, producing a supply of poles by cutting just above the base of the trunk on a regular, usually 7-year, cycle. This allows the trees to regenerate, but allows more glades with sunlight for lepidoptera. flight period The length of the adult (flying) period. foodplant The plant species on which the butterfly caterpillars feed. hibernaculum The shelter of an overwintering larva, usually created from a leaf. imago The final, fully developed adult stage of insect development, following the larva and pupal stages. instar A stage of growth between successive moults in caterpillars. introduction The intentional or accidental release of an organism to a place outside its recent range. reintroduction The intentional release of an organism into a part of its native range from which it has become extinct. Species Action Plans Plans that began in the 1990s, drawn up by Butterfly Conservation in response to the serious problems for butterflies with special habitat needs. univoltine Having one brood or generation each year. © David Spooner November 2002
A personal reminiscence of Dr. John Berry (1907-2002) John Berry`s contribution to conservation and knowledge of biodiversity in Scotland is little short of phenomenal. He could have had no finer tutor in these matters than a regular visitor to his childhood home at Tayfield, Patrick Geddes - whose magnificent plans for a Nature Palace down the road at Dunfermline had been deemed too visionary in 1904. I will not try to list all Dr. Berry`s achievements, but to mention a few - he was fish scientist to the new Hydro Board, and conceived the fish ladder at the dam at Pitlochry; he was a founder of the International Union for the Preservation of Nature at Fontainebleau in 1948 and the first director of Nature Conservancy in Scotland in 1949. He was a member of the International Committee for Bird Preservation, and wrote the definitive The status and distribution of wild geese and wild duck in Scotland in 1939. To him we owe a whole range of Scottish nature reserves from the Cairngorms to Tentsmuir on his doorstep. A full list of his public offices can be seen in the latest Who`s Who. But I should like to add some memories of his interest in lepidoptera. I recall a visit where there was great excitement while he gathered in for examination a stray Mouse Moth. He had rigged up what he called the Tayfield Insect House next to the Garden House he and his wife, Bride, lived in. With typical ingenuity, he had adapted an old boiler to fuel it as a home to a myriad of moths. I have in front of me a photograph of one moth of which he was especially proud. It was an Indian Moon Moth (Actias selene) which normally has two tail strands, but which in this case had a stunted, defective left tail. The Edinburgh Butterfly House supplied him with his larvae, and one of the clues to his amazing youthfulness even in his 80s and 90s was his love of lepidoptera. Their flights and distinctive characters - for contrary to appearances, individual butterflies and moths do respond differently - appealed to something in his nature. I only knew him in the last decade of his life, but I recall that when we had chatted, he remarked “so you are another crazy mixed-up kid just like me!” Well, with an introduction like that one knew that for all his honours, there was no way John Berry stood on formality. Although he had suffered from the bone-wasting Paget`s Disease for some 30 years, this never hindered his getting about his lepidopteral investigations. There was further lepidopteral excitement when he discovered a dwarf Small White (Pieris rapae) in his garden, which he got me to send to the Natural History Museum at Kensington. As it happened, that Museum had a number of examples already, but I have not heard of many such specimens within Scotland. I still have the creature in all its fragile glory.. It serves to recall a man of truly natural modesty, who yet entertained a herculean determination to secure Scotland`s natural heritage for future generations. Patrick Geddes remarked (in his Report on Dunfermline in 1904) that “the east coast of Scotland has furnished many and marked examples of men of naturalist genius who have broken through all the difficulties of their circumstances to an original grasp of things.” Dr. John Berry deserves pride of place in the Scottish Hall of Ecological fame alongside such as David Douglas, George Forrest, Robert Fortune, Joseph Dalton Hooker (who grew up in Glasgow), D`Arcy Wentworth Thompson and Geddes himself. Books referred to: John Berry, The status and distribution of wild geese and wild duck in Scotland. Cambridge University Press, 1939. Patrick Geddes, City development, a study of parks, gardens, and culture-institutes; a report to the Carnegie Dunfermline Trust. Edinburgh 1904; reprinted by the Irish University Press, Dublin, 1973. © David Spooner
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