90-443: The green hairstreak ( Callophrys rubi ) is a small butterfly in the family Lycaenidae . The genus name Callophrys is a Greek word meaning "beautiful eyebrows", while the species Latin name rubi derives from Rubus (bramble), one of the host plants. Callophrys rubi has a wingspan reaching about 26–30 millimetres (1.0–1.2 in) in length. The oversides of the wings are a uniform dull brown, with two paler patches on
180-631: A diapause (resting) stage, and the hatching may take place only in spring. Some temperate region butterflies, such as the Camberwell beauty , lay their eggs in the spring and have them hatch in the summer. Butterfly larvae, or caterpillars, consume plant leaves and spend practically all of their time searching for and eating food. Although most caterpillars are herbivorous, a few species are predators : Spalgis epius eats scale insects , while lycaenids such as Liphyra brassolis are myrmecophilous , eating ant larvae. Some larvae, especially those of
270-450: A black-edged yellow dorsal line accompanied by pale spots, and with a yellowish side-line. It feeds in June and the autumn particularly on Papilionaceae, such as Sarothamnus, Genista, Cytisus , but also on many other plants, as oak, Vaccinium, Sedum , etc. It often bores deep into the flowers of Genista . Pupa short, much rounded; resembling a small bean, immovable, but nevertheless producing
360-493: A butterfly cannot fly until the wings are unfolded. A newly emerged butterfly needs to spend some time inflating its wings with hemolymph and letting them dry, during which time it is extremely vulnerable to predators. The colourful patterns on many butterfly wings tell potential predators that they are toxic. Hence, the genetic basis of wing pattern formation can illuminate both the evolution of butterflies as well as their developmental biology . The colour of butterfly wings
450-570: A butterfly through metamorphosis has held great appeal to mankind. To transform from the miniature wings visible on the outside of the pupa into large structures usable for flight, the pupal wings undergo rapid mitosis and absorb a great deal of nutrients. If one wing is surgically removed early on, the other three will grow to a larger size. In the pupa, the wing forms a structure that becomes compressed from top to bottom and pleated from proximal to distal ends as it grows, so that it can rapidly be unfolded to its full adult size. Several boundaries seen in
540-417: A common family. In some species, such as the great spangled fritillary , the eggs are deposited close to but not on the food plant. This most likely happens when the egg overwinters before hatching and where the host plant loses its leaves in winter, as do violets in this example. The egg stage lasts a few weeks in most butterflies, but eggs laid close to winter, especially in temperate regions, go through
630-791: A disturbance or fire. Birches are early tree species to become established in primary successions , and can become a threat to heathland if the seedlings and saplings are not suppressed by grazing or periodic burning. Birches are generally lowland species, but some species, such as Betula nana , have a montane distribution. In the British Isles , there is some difference between the environments of Betula pendula and Betula pubescens , and some hybridization, though both are "opportunists in steady-state woodland systems". Mycorrhizal fungi , including sheathing (ecto)mycorrhizas, are found in some cases to be beneficial to tree growth. A large number of lepidopteran insects feed on birch foliage. Because of
720-479: A feeble noise, which Kleemann calls creaking,Schilde twittering or chirping. The butterflies occur from April into July and in warmer districts of the plains again in July and August, the two broods being almost continuous, for instance at Darmstadt. They are very plentiful in most places and always rest with closed wings on shrubs and green twigs of Genista; they are not shy, the spring-specimens being particularly fond of
810-571: A few butterflies (e.g., harvesters ) eat harmful insects, and a few are predators of ants , while others live as mutualists in association with ants. Culturally, butterflies are a popular motif in the visual and literary arts. The Smithsonian Institution says "butterflies are certainly one of the most appealing creatures in nature". The Oxford English Dictionary derives the word straightforwardly from Old English butorflēoge , butter-fly; similar names in Old Dutch and Old High German show that
900-444: A few species. Some butterflies have organs of hearing and some species make stridulatory and clicking sounds. Many species of butterfly maintain territories and actively chase other species or individuals that may stray into them. Some species will bask or perch on chosen perches. The flight styles of butterflies are often characteristic and some species have courtship flight displays. Butterflies can only fly when their temperature
990-400: A half-anther. Anther cells open longitudinally. The pistillate segments are erect or pendulous, and solitary, terminal on the two-leaved lateral spur-like branchlets of the year. The pistillate scales are oblong-ovate, three-lobed, pale yellow-green often tinged with red, becoming brown at maturity. These scales bear two or three fertile flowers, each flower consisting of a naked ovary. The ovary
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#17328734469451080-606: A hard-ridged outer layer of shell, called the chorion . This is lined with a thin coating of wax which prevents the egg from drying out before the larva has had time to fully develop. Each egg contains a number of tiny funnel-shaped openings at one end, called micropyles ; the purpose of these holes is to allow sperm to enter and fertilize the egg. Butterfly eggs vary greatly in size and shape between species, but are usually upright and finely sculptured. Some species lay eggs singly, others in batches. Many females produce between one hundred and two hundred eggs. Butterfly eggs are fixed to
1170-503: A leaf before eggs are laid on it. Many butterflies use chemical signals, pheromones ; some have specialized scent scales ( androconia ) or other structures ( coremata or "hair pencils" in the Danaidae). Vision is well developed in butterflies and most species are sensitive to the ultraviolet spectrum. Many species show sexual dimorphism in the patterns of UV reflective patches. Colour vision may be widespread but has been demonstrated in only
1260-416: A leaf with a special glue which hardens rapidly. As it hardens it contracts, deforming the shape of the egg. This glue is easily seen surrounding the base of every egg forming a meniscus. The nature of the glue has been little researched but in the case of Pieris brassicae , it begins as a pale yellow granular secretion containing acidophilic proteins. This is viscous and darkens when exposed to air, becoming
1350-547: A longer lifespan of several months as adults. The thorax of the butterfly is devoted to locomotion. Each of the three thoracic segments has two legs (among nymphalids , the first pair is reduced and the insects walk on four legs). The second and third segments of the thorax bear the wings. The leading edges of the forewings have thick veins to strengthen them, and the hindwings are smaller and more rounded and have fewer stiffening veins. The forewings and hindwings are not hooked together ( as they are in moths ) but are coordinated by
1440-448: A necessity for their successful establishment. Many butterflies, such as the painted lady , monarch, and several danaine migrate for long distances. These migrations take place over a number of generations and no single individual completes the whole trip. The eastern North American population of monarchs can travel thousands of miles south-west to overwintering sites in Mexico . There is
1530-646: A reverse migration in the spring. It has recently been shown that the British painted lady undertakes a 9,000-mile round trip in a series of steps by up to six successive generations, from tropical Africa to the Arctic Circle — almost double the length of the famous migrations undertaken by monarch. Spectacular large-scale migrations associated with the monsoon are seen in peninsular India. Migrations have been studied in more recent times using wing tags and also using stable hydrogen isotopes . Butterflies navigate using
1620-412: A segmented palp. Adjoining these is the labium-hypopharynx which houses a tubular spinneret which is able to extrude silk. Caterpillars such as those in the genus Calpodes (family Hesperiidae) have a specialized tracheal system on the 8th segment that function as a primitive lung. Butterfly caterpillars have three pairs of true legs on the thoracic segments and up to six pairs of prolegs arising from
1710-435: A silken girdle may be spun to keep the pupa in a head-up position. Most of the tissues and cells of the larva are broken down inside the pupa, as the constituent material is rebuilt into the imago. The structure of the transforming insect is visible from the exterior, with the wings folded flat on the ventral surface and the two halves of the proboscis, with the antennae and the legs between them. The pupal transformation into
1800-665: A single generation, and a few in cold locations may take several years to pass through their entire life cycle. Butterflies are often polymorphic , and many species make use of camouflage , mimicry , and aposematism to evade their predators. Some, like the monarch and the painted lady , migrate over long distances. Many butterflies are attacked by parasites or parasitoids , including wasps , protozoans , flies , and other invertebrates, or are preyed upon by other organisms. Some species are pests because in their larval stages they can damage domestic crops or trees; other species are agents of pollination of some plants. Larvae of
1890-566: A slightly weeping habit. Other species with ornamental white bark include Betula ermanii , Betula papyrifera , Betula pendula and Betula raddeana . In the European Union, a prescription gel containing birch bark extract (commercial name Episalvan , betulae cortex dry extract (5–10 : 1); extraction solvent: n -heptane 95% (w/w)) was approved in 2016 for the topical treatment of minor skin wounds in adults. Although its mechanism of action in helping to heal injured skin
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#17328734469451980-410: A time-compensated sun compass. They can see polarized light and therefore orient even in cloudy conditions. The polarized light near the ultraviolet spectrum appears to be particularly important. Many migratory butterflies live in semi-arid areas where breeding seasons are short. The life histories of their host plants also influence butterfly behaviour. Butterflies in their adult stage can live from
2070-528: A total of about 20,000 species. Traditionally, butterflies have been divided into the superfamilies Papilionoidea and the moth-like Hedyloidea . Recent work has discovered that Hedylidae, the only family within Hedyloidea, is nested within the Papilionoidea, meaning that Papilionoidea would be synonymous with Rhopalocera. The relationships between the rest of the 6 families are extremely well resolved, which
2160-470: A trend towards multivoltinism . Courtship is often aerial and often involves pheromones . Butterflies then land on the ground or on a perch to mate. Copulation takes place tail-to-tail and may last from minutes to hours. Simple photoreceptor cells located at the genitals are important for this and other adult behaviours. The male passes a spermatophore to the female; to reduce sperm competition, he may cover her with his scent, or in some species such as
2250-486: A tubular proboscis which is curled up at rest and expanded when needed to feed. The first and second maxillae bear palps which function as sensory organs. Some species have a reduced proboscis or maxillary palps and do not feed as adults. Many Heliconius butterflies also use their proboscis to feed on pollen; in these species only 20% of the amino acids used in reproduction come from larval feeding, which allow them to develop more quickly as caterpillars, and gives them
2340-437: A water-insoluble, rubbery material which soon sets solid. Butterflies in the genus Agathymus do not fix their eggs to a leaf; instead, the newly laid eggs fall to the base of the plant. Eggs are almost invariably laid on plants. Each species of butterfly has its own host plant range and while some species of butterfly are restricted to just one species of plant, others use a range of plant species, often including members of
2430-422: A week to nearly a year depending on the species. Many species have long larval life stages while others can remain dormant in their pupal or egg stages and thereby survive winters. The Melissa Arctic ( Oeneis melissa ) overwinters twice as a caterpillar. Butterflies may have one or more broods per year. The number of generations per year varies from temperate to tropical regions with tropical regions showing
2520-453: Is a small samara , although the wings may be obscure in some species. They differ from the alders ( Alnus , another genus in the family) in that the female catkins are not woody and disintegrate at maturity, falling apart to release the seeds, unlike the woody, cone-like female alder catkins. The bark of all birches is characteristically marked with long, horizontal lenticels , and often separates into thin, papery plates, especially upon
2610-407: Is able to use a wide range of habitats including chalk downland, heathland, moorland and clearings in woodland. It is present in wetlands as well as on poor dry meadows, at an elevation of about 0–2,300 metres (0–7,546 ft). Callophrys rubi is found in most of Europe, North Africa , Russia , Asia Minor , Siberia , Amurland , Baluchistan and Chitral . It is still widespread across most of
2700-450: Is above 27 °C (81 °F); when it is cool, they can position themselves to expose the underside of the wings to the sunlight to heat themselves up. If their body temperature reaches 40 °C (104 °F), they can orientate themselves with the folded wings edgewise to the sun. Basking is an activity which is more common in the cooler hours of the morning. Some species have evolved dark wingbases to help in gathering more heat and this
2790-484: Is as large as the largest European specimens, the upperside darker, the underside deeper green. From Saisan and Lepsa; as true rubi also occurs in these localities, suaveola may turn out to be the summer-brood. — There occur, moreover, a number of individual varieties; for instance, specimens with the underside brown instead of green, females with a reddish yellow discal spot on the forewing above (Blachier), etc. Egg depressed , green, reticulate. Larva dark green, with
Green hairstreak - Misplaced Pages Continue
2880-861: Is closely related to the beech - oak family Fagaceae . The genus Betula contains 30 to 60 known taxa of which 11 are on the IUCN 2011 Red List of Threatened Species. They are typically short-lived pioneer species and are widespread in the Northern Hemisphere , particularly in northern areas of temperate climates and in boreal climates . Birch wood is used for a wide range of purposes. Birch species are generally small to medium-sized trees or shrubs , mostly of northern temperate and boreal climates. The simple leaves are alternate, singly or doubly serrate, feather-veined, petiolate and stipulate. They often appear in pairs, but these pairs are really borne on spur-like, two-leaved, lateral branchlets . The fruit
2970-666: Is compressed, two-celled, and crowned with two slender styles; the ovule is solitary. Each scale bears a single small, winged nut that is oval, with two persistent stigmas at the apex. Betula species are organised into five subgenera. Note: many American texts have B. pendula and B. pubescens confused, though they are distinct species with different chromosome numbers. The common name birch comes from Old English birce , bierce , from Proto-Germanic * berk-jōn (cf. German Birke , West Frisian bjirk ), an adjectival formation from * berkōn (cf. Dutch berk , Low German Bark , Danish birk , Norwegian bjørk ), itself from
3060-458: Is derived from tiny structures called scales, each of which have their own pigments . In Heliconius butterflies, there are three types of scales: yellow/white, black, and red/orange/brown scales. Some mechanism of wing pattern formation are now being solved using genetic techniques. For instance, a gene called cortex determines the colour of scales: deleting cortex turned black and red scales yellow. Mutations, e.g. transposon insertions of
3150-403: Is especially evident in alpine forms. As in many other insects, the lift generated by butterflies is more than can be accounted for by steady-state, non-transitory aerodynamics . Studies using Vanessa atalanta in a wind tunnel show that they use a wide variety of aerodynamic mechanisms to generate force. These include wake capture , vortices at the wing edge, rotational mechanisms and
3240-410: Is extruded and inserted into the female's vagina. A spermatophore is deposited in the female, following which the sperm make their way to a seminal receptacle where they are stored for later use. In both sexes, the genitalia are adorned with various spines, teeth, scales and bristles, which act to prevent the butterfly from mating with an insect of another species. After it emerges from its pupal stage,
3330-400: Is fair. The flowers are monoecious , and open with or before the leaves. Once fully grown, these leaves are usually 3–6 millimetres ( 1 ⁄ 8 – 1 ⁄ 4 in) long on three-flowered clusters in the axils of the scales of drooping or erect catkins or aments. Staminate catkins are pendulous, clustered, or solitary in the axils of the last leaves of the branch of the year or near
3420-451: Is good, especially in some species in the blue/violet range. The antennae are composed of many segments and have clubbed tips (unlike moths that have tapering or feathery antennae). The sensory receptors are concentrated in the tips and can detect odours. Taste receptors are located on the palps and on the feet. The mouthparts are adapted to sucking and the mandibles are usually reduced in size or absent. The first maxillae are elongated into
3510-600: Is highly adaptive and able to sustain harsh conditions with casual indifference. Proof of this adaptability is seen in its easy and eager ability to repopulate areas damaged by forest fires or clearings. Birches are also associated with Tír na nÓg , the land of the dead and the Sidhe , in Gaelic folklore, and as such frequently appear in Scottish, Irish, and English folksongs and ballads in association with death, or fairies, or returning from
3600-840: Is named after the birch. The generic name Betula is from Latin , which is a diminutive borrowed from Gaulish betua (cf. Old Irish bethe , Welsh bedw ). Within Betulaceae, birches are most closely related to alder. The oldest known birch fossils are those of Betula leopoldae from the Klondike Mountain Formation in Washington State, US, which date to the early Eocene ( Ypresian ) around 49 million years ago. Birches often form even-aged stands on light, well-drained, particularly acidic soils . They are regarded as pioneer species , rapidly colonizing open ground especially in secondary successional sequences following
3690-563: Is native to the Americas, but in the nineteenth century or before, spread across the world, and is now found in Australia, New Zealand, other parts of Oceania, and the Iberian Peninsula . It is not clear how it dispersed; adults may have been blown by the wind or larvae or pupae may have been accidentally transported by humans, but the presence of suitable host plants in their new environment was
Green hairstreak - Misplaced Pages Continue
3780-526: Is not fully understood, birch bark extract appears to stimulate the growth of keratinocytes which then fill the wound. Preliminary research indicates that the phytochemicals , betulin and possibly other triterpenes , are active in Episalvan gel and wound healing properties of birch bark. Over centuries, birch bark was used in traditional medicine practices by North American indigenous people for treating superficial wounds by applying bark directly to
3870-465: Is restricted to the males, and studies have suggested that the nutrients collected may be provided as a nuptial gift , along with the spermatophore, during mating. In hilltopping , males of some species seek hilltops and ridge tops, which they patrol in search for females. Since it usually occurs in species with low population density, it is assumed these landscape points are used as meeting places to find mates. Butterflies use their antennae to sense
3960-692: Is summarized in the below cladogram. Papilionidae [REDACTED] Hedylidae [REDACTED] Hesperiidae [REDACTED] Pieridae [REDACTED] Nymphalidae [REDACTED] Lycaenidae [REDACTED] Riodinidae [REDACTED] Butterfly adults are characterized by their four scale-covered wings, which give the Lepidoptera their name ( Ancient Greek λεπίς lepís, scale + πτερόν pterón, wing). These scales give butterfly wings their colour: they are pigmented with melanins that give them blacks and browns, as well as uric acid derivatives and flavones that give them yellows, but many of
4050-405: Is taken up by the gut, but there may also be large silk glands, and special glands which secrete distasteful or toxic substances. The developing wings are present in later stage instars and the gonads start development in the egg stage. When the larva is fully grown, hormones such as prothoracicotropic hormone (PTTH) are produced. At this point the larva stops feeding, and begins "wandering" in
4140-473: The Lycaenidae , form mutual associations with ants. They communicate with the ants using vibrations that are transmitted through the substrate as well as using chemical signals. The ants provide some degree of protection to these larvae and they in turn gather honeydew secretions . Large blue ( Phengaris arion ) caterpillars trick Myrmica ants into taking them back to the ant colony where they feed on
4230-501: The Proto-Indo-European root * bʰerHǵ- ~ bʰrHǵ -, which also gave Lithuanian béržas , Latvian Bērzs , Russian берёза (berëza) , Ukrainian береза ( beréza) , Albanian bredh 'fir', Ossetian bærz(æ) , Sanskrit bhurja , Polish brzoza , Latin fraxinus 'ash (tree)'. This root is presumably derived from * bʰreh₁ǵ- 'to shine, whiten', in reference to the birch's white bark. The Proto-Germanic rune berkanan
4320-469: The Weis-Fogh ' clap-and-fling ' mechanism. Butterflies are able to change from one mode to another rapidly. Butterflies are threatened in their early stages by parasitoids and in all stages by predators, diseases and environmental factors. Braconid and other parasitic wasps lay their eggs in lepidopteran eggs or larvae and the wasps' parasitoid larvae devour their hosts, usually pupating inside or outside
4410-452: The ZW sex-determination system where females are the heterogametic sex (ZW) and males homogametic (ZZ). Butterflies are distributed worldwide except Antarctica, totalling some 18,500 species. Of these, 775 are Nearctic ; 7,700 Neotropical ; 1,575 Palearctic ; 3,650 Afrotropical ; and 4,800 are distributed across the combined Oriental and Australian / Oceania regions. The monarch butterfly
4500-600: The non-coding DNA around the cortex gene can turn a black-winged butterfly into a butterfly with a yellow wing band. When the butterfly Bicyclus anynana is subjected to repeated inbreeding in the laboratory, there is a dramatic decrease in egg hatching. This severe inbreeding depression is considered to be likely due to a relatively high mutation rate to recessive alleles with substantial damaging effects and infrequent episodes of inbreeding in nature that might otherwise purge such mutations. Although B. anynana experiences inbreeding depression when forcibly inbred in
4590-411: The paper birch . Distinctive colors give the common names gray , white , black , silver and yellow birch to different species. The buds, forming early and full-grown by midsummer, are all lateral, without a terminal bud forming; the branch is prolonged by the upper lateral bud. The wood of all the species is close-grained with a satiny texture and capable of taking a fine polish; its fuel value
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#17328734469454680-557: The superfamilies Hedyloidea (moth-butterflies in the Americas) and Papilionoidea (all others). The oldest butterfly fossils have been dated to the Paleocene , about 56 million years ago, though molecular likely originated in the Cretaceous . Butterflies have a four-stage life cycle , and like other holometabolous insects they undergo complete metamorphosis . Winged adults lay eggs on
4770-535: The Apollos ( Parnassius ) plugs her genital opening to prevent her from mating again. The vast majority of butterflies have a four-stage life cycle: egg , larva (caterpillar), pupa (chrysalis) and imago (adult). In the genera Colias , Erebia , Euchloe , and Parnassius , a small number of species are known that reproduce semi-parthenogenetically ; when the female dies, a partially developed larva emerges from her abdomen. Butterfly eggs are protected by
4860-552: The Swedish city of Umeå . In 1888, the Umeå city fire spread all over the city and nearly burnt it down to the ground, but some birches, supposedly, halted the spread of the fire. To protect the city against future fires, wide avenues were created, and these were lined with silver birch trees all over the city. Umeå later adopted the unofficial name of "City of the Birches ( Björkarnas stad )". Also,
4950-455: The UK, although many colonies have been lost in recent years. In Mediterranean countries it is quite localised and it is usually found near the coasts. Butterfly Butterflies are winged insects from the lepidopteran suborder Rhopalocera , characterized by large, often brightly coloured wings that often fold together when at rest, and a conspicuous, fluttering flight. The group comprises
5040-430: The abdomen, generally with short prolegs on segments 3–6 and 10; the three pairs of true legs on the thorax have five segments each. Many are well camouflaged; others are aposematic with bright colours and bristly projections containing toxic chemicals obtained from their food plants. The pupa or chrysalis, unlike that of moths, is not wrapped in a cocoon. Many butterflies are sexually dimorphic . Most butterflies have
5130-405: The abdominal segments. These prolegs have rings of tiny hooks called crochets that are engaged hydrostatically and help the caterpillar grip the substrate. The epidermis bears tufts of setae , the position and number of which help in identifying the species. There is also decoration in the form of hairs, wart-like protuberances, horn-like protuberances and spines. Internally, most of the body cavity
5220-502: The adult colour pattern are marked by changes in the expression of particular transcription factors in the early pupa. The reproductive stage of the insect is the winged adult or imago . The surface of both butterflies and moths is covered by scales, each of which is an outgrowth from a single epidermal cell. The head is small and dominated by the two large compound eyes . These are capable of distinguishing flower shapes or motion but cannot view distant objects clearly. Colour perception
5310-467: The air for wind and scents. The antennae come in various shapes and colours; the hesperiids have a pointed angle or hook to the antennae, while most other families show knobbed antennae. The antennae are richly covered with sensory organs known as sensillae . A butterfly's sense of taste is coordinated by chemoreceptors on the tarsi , or feet, which work only on contact, and are used to determine whether an egg-laying insect's offspring will be able to feed on
5400-434: The ant eggs and larvae in a parasitic relationship. Caterpillars mature through a series of developmental stages known as instars . Near the end of each stage, the larva undergoes a process called apolysis , mediated by the release of a series of neurohormones . During this phase, the cuticle , a tough outer layer made of a mixture of chitin and specialized proteins , is released from the softer epidermis beneath, and
5490-410: The back. Like other members of the family they are rather sluglike. T. rubi L. (72 e). Above black-brown with white fringes; male with a scent-patch on the forewing below the costa in the centre. Beneath green, with some white dots on the disc of the hindwing. In ab. immaculata Fuchs (72 e) these white dots are absent, while they form a complete row in ab. punctata Tutt. which is even continued on to
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#17328734469455580-425: The birch ( Sanskrit : भुर्ज, bhurja ) holds great historical significance in the culture of North India , where the thin bark coming off in winter was extensively used as writing paper. Birch paper (Sanskrit: भुर्ज पत्र, bhurja patra ) is exceptionally durable and was the material used for many ancient Indian texts. The Roman period Vindolanda tablets also use birch as a material on which to write and birch bark
5670-658: The blues, greens, reds and iridescent colours are created by structural coloration produced by the micro-structures of the scales and hairs. As in all insects, the body is divided into three sections: the head, thorax , and abdomen . The thorax is composed of three segments, each with a pair of legs. In most families of butterfly the antennae are clubbed, unlike those of moths which may be threadlike or feathery. The long proboscis can be coiled when not in use for sipping nectar from flowers. Nearly all butterflies are diurnal , have relatively bright colours, and hold their wings vertically above their bodies when at rest, unlike
5760-560: The closeness to nature of the Russians. It's associated with marriage and love. There are numerous folkloric Russian songs in which the birch tree occurs. The Ornäs birch is the national tree of Sweden. The Czech word for the month of March, Březen, is derived from the Czech word bříza meaning birch, as birch trees flower in March under local conditions. The silver birch tree is of special importance to
5850-438: The construction of drum shells, owing to its strength and colour which takes stain in an appealing way, and which can also amber over very well, while also giving the drums an appealing tone which changes depending on the type of birch used. Birches have spiritual importance in several religions, both modern and historical. In Celtic cultures, the birch symbolises growth, renewal, stability, initiation, and adaptability because it
5940-441: The desiccated husk. Most wasps are very specific about their host species and some have been used as biological controls of pest butterflies like the large white butterfly . When the small cabbage white was accidentally introduced to New Zealand, it had no natural enemies. In order to control it, some pupae that had been parasitised by a chalcid wasp were imported, and natural control was thus regained. Some flies lay their eggs on
6030-522: The ends of the short lateral branchlets of the year. They form in early autumn and remain rigid during the winter. The scales of the mature staminate catkins are broadly ovate, rounded, yellow or orange colour below the middle and dark chestnut brown at apex. Each scale bears two bractlets and three sterile flowers, each flower consisting of a sessile, membranous, usually two-lobed, calyx. Each calyx bears four short filaments with one-celled anthers or strictly, two filaments divided into two branches, each bearing
6120-419: The epidermis begins to form a new cuticle. At the end of each instar, the larva moults , the old cuticle splits and the new cuticle expands, rapidly hardening and developing pigment. Development of butterfly wing patterns begins by the last larval instar. Caterpillars have short antennae and several simple eyes . The mouthparts are adapted for chewing with powerful mandibles and a pair of maxillae, each with
6210-710: The family Hesperiidae (skippers). Molecular clock estimates suggest that butterflies originated sometime in the Late Cretaceous , but only significantly diversified during the Cenozoic, with one study suggesting a North American origin for the group. The oldest American butterfly is the Late Eocene Prodryas persephone from the Florissant Fossil Beds , approximately 34 million years old. Butterflies are divided into seven families that contain
6300-419: The flowers of Potentilla . These butterflies can be found at the end of March, with flight time usually lasting until the end of June, but they are sometimes seen in July and early August. They never rest with their wings open, to maintain their green camouflage. The males exhibit territorial behavior. The eggs are laid singly. The caterpillars are not known to be tended by ants, unlike some lycid larvae, but
6390-403: The food plant on which their larvae , known as caterpillars , will feed. The caterpillars grow, sometimes very rapidly, and when fully developed, pupate in a chrysalis . When metamorphosis is complete, the pupal skin splits, the adult insect climbs out, expands its wings to dry, and flies off. Some butterflies, especially in the tropics, have several generations in a year, while others have
6480-476: The forewing. Numerous modifications in the degree of completeness or obsolescence of the row have received names ( caecus , incompleta , bipuncata , etc.), such individual aberrations occurring all among specimens of the nymotypical race. — borealis Krul,[now C. r. borealis Krulikovsky, 1890] from Kasan, is somewhat smaller, being more yellowish green and without the white dots of the nymotypical form. — polaris Moschl [ C. r. borealis Krulikovsky, 1890], from
6570-409: The friction of their overlapping parts. The front two segments have a pair of spiracles which are used in respiration. The abdomen consists of ten segments and contains the gut and genital organs. The front eight segments have spiracles and the terminal segment is modified for reproduction. The male has a pair of clasping organs attached to a ring structure, and during copulation, a tubular structure
6660-544: The grass was growing. The earliest Lepidoptera fossils date to the Triassic - Jurassic boundary, around 200 million years ago. Butterflies evolved from moths, so while the butterflies are monophyletic (forming a single clade ), the moths are not. The oldest known butterfly is Protocoeliades kristenseni from the Palaeocene aged Fur Formation of Denmark, approximately 55 million years old, which belongs to
6750-600: The grave. The leaves of the silver birch tree are used in the festival of St George, held in Novosej and other villages in Albania. The birch is New Hampshire 's state tree and the national tree of Finland and Russia. The yellow birch is the official tree of the province of Quebec (Canada). The birch is a very important element in Russian culture and represents the grace, strength, tenderness and natural beauty of Russian women as well as
6840-429: The hardness of birch, it is easier to shape it with power tools; it is quite difficult to work it with hand tools. The inner bark is considered edible as an emergency food, even when raw. It can be dried and ground into flour, as was done by Native Americans and early settlers. It can also be cut into strips and cooked like noodles. The sap can be drunk or used to make syrup and birch beer . Tea can be made from
6930-409: The ice hockey team of Umeå is called Björklöven , translated to English "The Birch Leaves". "Swinging" birch trees was a common game for American children in the nineteenth century. American poet Lucy Larcom 's "Swinging on a Birch Tree" celebrates the game. The poem inspired Robert Frost , who pays homage to the act of climbing birch trees in his more famous poem, "Birches". Frost once told "it
7020-1030: The laboratory it recovers within a few generation when allowed to breed freely. During mate selection, adult females do not innately avoid or learn to avoid siblings, implying that such detection may not be critical to reproductive fitness. Inbreeding may persist in B anynana because the probability of encountering close relatives is rare in nature; that is, movement ecology may mask the deleterious effect of inbreeding resulting in relaxation of selection for active inbreeding avoidance behaviors. Butterflies feed primarily on nectar from flowers. Some also derive nourishment from pollen , tree sap, rotting fruit, dung, decaying flesh, and dissolved minerals in wet sand or dirt. Butterflies are important as pollinators for some species of plants. In general, they do not carry as much pollen load as bees , but they are capable of moving pollen over greater distances. Flower constancy has been observed for at least one species of butterfly. Adult butterflies consume only liquids, ingested through
7110-688: The largest range of food plants of any British butterfly. Early butterfly collectors thought that the only food plant was bramble (blackberry) Rubus fruticosus but as its habits became better understood the list grew and will probably continue to do so. Depending on the habitat it will use common rock rose Helianthemum nummularium , bird's-foot trefoil Lotus corniculatus , gorse Ulex europaeus , broom Cytisus scoparius , Dyer's greenweed Genista tinctoria , bilberry Vaccinium myrtillus , dogwood Cornus sanguinea , buckthorn Rhamnus cathartica , cross-leaved heath Erica tetralix and bramble. The wide range of food plants means that this butterfly
7200-506: The majority of moths which fly by night, are often cryptically coloured (well camouflaged), and either hold their wings flat (touching the surface on which the moth is standing) or fold them closely over their bodies. Some day-flying moths, such as the hummingbird hawk-moth , are exceptions to these rules. Butterfly larvae , caterpillars , have a hard ( sclerotised ) head with strong mandibles used for cutting their food, most often leaves. They have cylindrical bodies, with ten segments to
7290-433: The male's forewings made up of scent scales. The undersides are a bright green with a thin white line, often reduced to a faint row of dots or even missing altogether. The iridescent green colour of the undersides is a structural colour caused by diffraction and interference of light by microscopic repeating structures forming a diffraction grating in the wing scales. The caterpillars are green with yellow markings along
7380-540: The most northern districts of the area of distribution , is a small form, with the underside duller green. — sibirica Ruhl [ C. r. sibirica (Rühl, 1895)] differs in almost the same way, the underside being less bright green than in rubi rubi ; Northern Asia. — fervida Stgr.[ C. r. fervida Staudinger, 1901] (72 f) is a southern form, the upperside being paler brown with a golden sheen (unfortunately not distinct in our figure). — suaveola Stgr.[now species Callophrys suaveola (Staudinger, 1881)(72 f), from Central Asia,
7470-401: The name is ancient, but modern Dutch and German use different words ( vlinder and Schmetterling ) and the common name often varies substantially between otherwise closely related languages. A possible source of the name is the bright yellow male of the brimstone ( Gonepteryx rhamni ); another is that butterflies were on the wing in meadows during the spring and summer butter season while
7560-441: The outside of caterpillars and the newly hatched fly larvae bore their way through the skin and feed in a similar way to the parasitoid wasp larvae. Predators of butterflies include ants, spiders, wasps, and birds. Betula A birch is a thin-leaved deciduous hardwood tree of the genus Betula ( / ˈ b ɛ tj ʊ l ə / ), in the family Betulaceae , which also includes alders , hazels , and hornbeams . It
7650-529: The proboscis. They sip water from damp patches for hydration and feed on nectar from flowers, from which they obtain sugars for energy, and sodium and other minerals vital for reproduction. Several species of butterflies need more sodium than that provided by nectar and are attracted by sodium in salt; they sometimes land on people, attracted by the salt in human sweat. Some butterflies also visit dung and scavenge rotting fruit or carcasses to obtain minerals and nutrients. In many species, this mud-puddling behaviour
7740-669: The pupae, which are formed at ground level, emit squeaks that attract ants and it is thought that ants will always bury any that are found. Green hairstreaks overwinter as pupae and are univoltine , having one generation of adult butterflies per year. The larva is recorded as feeding on Vaccinium myrtillus , Vaccinum uliginosum , Betula , Rubus idaeus , Vicia cracca , Trifolium medium , Calluna vulgaris , Frangula , Rhamnus , Ribes , Spiraea , Caragana , Chamaecytisus , Hedysarum , Genista , Trifolium and Hippophae rhamnoides in different parts of its range. This polyphagous species probably has one of
7830-431: The quest for a suitable pupation site, often the underside of a leaf or other concealed location. There it spins a button of silk which it uses to fasten its body to the surface and moults for a final time. While some caterpillars spin a cocoon to protect the pupa, most species do not. The naked pupa, often known as a chrysalis, usually hangs head down from the cremaster, a spiny pad at the posterior end, but in some species
7920-451: The red inner bark of black birches. White-barked birches in particular are cultivated as ornamental trees, largely for their appearance in winter. The Himalayan birch, Betula utilis , especially the variety or subspecies jacquemontii , is among the most widely planted for this purpose. It has been cultivated since the 1870s, and many cultivars are available, including 'Doorenbos', 'Grayswood Ghost' and 'Silver Shadow'; 'Knightshayes' has
8010-475: The skin. Splints made with birch bark were used as casts for broken limbs in the 16th century . Wood pulp made from birch gives relatively long and slender fibres for a hardwood . The thin walls cause the fibre to collapse upon drying, giving a paper with low bulk and low opacity. The birch fibres are, however, easily fibrillated and give about 75% of the tensile strength of softwood. The low opacity makes it suitable for making glassine . In India ,
8100-444: Was used widely in ancient Russia as notepaper ( beresta ) and for decorative purposes and even making footwear ( lapti ) and baskets. Birch wood is sometimes used as a tonewood for semiacoustic and acoustic guitar bodies, and occasionally for solid-body guitar bodies. It is also a common material used in mallets for keyboard percussion . Drum manufacturers, such as Gretsch and Yamaha , have been known to use birch wood in
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