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Lestes Barbarus
''Lestes barbarus'' is a species of damselfly of the family Lestidae, the spreadwings. Its common names in English include southern emerald damselfly, shy emerald damselfly, and migrant spreadwing.Clausnitzer, V. 2009''Lestes barbarus''.The IUCN Red List of Threatened Species. Downloaded on 28 January 2016. Distribution and habitat ''Lestes barbarus'' is a southern European species with a rapidly expanding range. It is found across southern Europe in a band across Spain, France, Italy and Greece to India and Mongolia. It is less common in northern Europe. It breeds in the Netherlands in coastal dunes and is increasing in number. It is at the edge of its range in the Channel Islands, where it has been breeding since 1995. It is also found in North Africa; it gets its Latin name as the first specimen was found in Barbary, North Africa. It is a damselfly of still water and can be found in stagnant and slightly brackish water. This species was first recorded in Britain at Winterton ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johan Christian Fabricius
Johan Christian Fabricius (7 January 1745 – 3 March 1808) was a Danish zoologist, specialising in "Insecta", which at that time included all arthropods: insects, arachnids, crustaceans and others. He was a student of Carl Linnaeus, and is considered one of the most important entomologists of the 18th century, having named nearly 10,000 species of animals, and established the basis for the modern insect classification. Biography Johan Christian Fabricius was born on 7 January 1745 at Tønder in the Duchy of Schleswig, where his father was a doctor. He studied at the gymnasium at Altona and entered the University of Copenhagen in 1762. Later the same year he travelled together with his friend and relative Johan Zoëga to Uppsala, where he studied under Carl Linnaeus for two years. On his return, he started work on his , which was finally published in 1775. Throughout this time, he remained dependent on subsidies from his father, who worked as a consultant at Frederiks Hospita ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Winterton Dunes
Winterton Dunes is an extensive dune system on the east coast of Norfolk, England, which has been designated as a National Nature Reserve of 109 ha. Winterton Dunes is within the Norfolk Coast AONB. The site is unusual in that it shows greater ecological similarities to the dune systems of the Baltic - which support acidic plant communities - rather than the dunes on the North Norfolk Coast - where the sand is calcareous. The site supports well developed areas of dune heath, wet 'slacks' between dunes and dune grassland which grades into grazing marsh and birch woodland. Fauna Natterjack toads breed in shallow pools within the site. The site, along with the adjoining Horsey Dunes, hosts the largest colonies of dark green fritillary and grayling butterflies in Norfolk. Other butterflies recorded from here in numbers include small copper and common blue. The ponds among the dunes are home to many dragonflies including the common hawker - which is rare in Norfolk. Winterton Dun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Damselflies Of Europe
Damselflies are flying insects of the suborder Zygoptera in the order Odonata. They are similar to dragonflies, which constitute the other odonatan suborder, Anisoptera, but are smaller and have slimmer bodies. Most species fold the wings along the body when at rest, unlike dragonflies which hold the wings flat and away from the body. An ancient group, damselflies have existed since at least the Lower Permian, and are found on every continent except Antarctica. All damselflies are predatory insects; both nymphs and adults actively hunt and eat other insects. The nymphs are aquatic, with different species living in a variety of freshwater habitats including acidic bogs, ponds, lakes and rivers. The nymphs moult repeatedly, at the last moult climbing out of the water to undergo metamorphosis. The skin splits down the back, they emerge and inflate their wings and abdomen to gain their adult form. Their presence on a body of water indicates that it is relatively unpolluted, but their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lestes
''Lestes'' is a genus of damselfly in the family Lestidae. The family hold their wings at about 45 degrees to the body when resting. This distinguishes them from most other species of damselflies which hold the wings along, and parallel to, the body when at rest. The name ''Lestes'' comes from the Greek word λῃστής (lēistēs) meaning ''predator''. Extant Species The genus ''Lestes'' includes the following species: Fossils *'' Lestes aquisextana '' *'' Lestes arvernus '' *'' Lestes brisaci '' *''Lestes ceresti '' *'' Lestes conexus '' *'' Lestes datangensis '' *'' Lestes dianacompteae '' *''Lestes forsterii '' *'' Lestes irenea '' *'' Lestes leucosia '' *'' Lestes ligea '' *'' Lestes lutzi '' *'' Lestes peisinoe '' *'' Lestes plicata '' *'' Lestes regina '' *''Lestes sieblosiformis '' *'' Lestes statzi '' *'' Lestes vicina '' *'' Lestes zalesskyi'' See also *Chalcolestes ''Chalcolestes'' is a small genus of damselfly in the family Lestidae. They are commonly known a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Damselflies Of The World (Lestidae)
*''Archilestes californicus'' *'' Archilestes exoletus'' *''Archilestes grandis'' *'' Archilestes guayaraca'' *'' Archilestes latialatus'' *'' Archilestes neblina'' *'' Archilestes regalis'' *''Archilestes tuberalatus'' *'' Austrolestes aleison'' *'' Austrolestes analis'' *'' Austrolestes annulosus'' *'' Austrolestes aridus'' *''Austrolestes cingulatus'' *'' Austrolestes colensonis'' *'' Austrolestes insularis'' *'' Austrolestes io'' *'' Austrolestes leda'' *''Austrolestes minjerriba'' *'' Austrolestes psyche'' *''Chalcolestes parvidens'' *''Chalcolestes viridis'' *''Indolestes albicaudus'' *''Indolestes alfurus'' *''Indolestes alleni'' *''Indolestes anomalus'' *''Indolestes aruanus'' *''Indolestes assamicus'' *''Indolestes bellax'' *''Indolestes bilineatus'' *''Indolestes birmanus'' *''Indolestes boninensis'' *''Indolestes cheesmanae'' *'' Indolestes coeruleus'' *''Indolestes cyaneus'' *'' Indolestes dajakanus'' *''Indolestes davenporti'' *''Indolestes divisus'' *'' Indolestes extra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Larva
A larva (; plural larvae ) is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle. The larva's appearance is generally very different from the adult form (''e.g.'' caterpillars and butterflies) including different unique structures and organs that do not occur in the adult form. Their diet may also be considerably different. Larvae are frequently adapted to different environments than adults. For example, some larvae such as tadpoles live almost exclusively in aquatic environments, but can live outside water as adult frogs. By living in a distinct environment, larvae may be given shelter from predators and reduce competition for resources with the adult population. Animals in the larval stage will consume food to fuel their transition into the adult form. In some organisms like polychaetes and barnacles, adults are immobil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diapause
In animal dormancy, diapause is the delay in development in response to regular and recurring periods of adverse environmental conditions.Tauber, M.J., Tauber, C.A., Masaki, S. (1986) ''Seasonal Adaptations of Insects''. Oxford University Press It is a physiological state with very specific initiating and inhibiting conditions. The mechanism is a means of surviving predictable, unfavorable environmental conditions, such as temperature extremes, drought, or reduced food availability. Diapause is observed in all the life stages of arthropods, especially insects. Embryonic diapause, a somewhat similar phenomenon, occurs in over 130 species of mammals, possibly even in humans, and in the embryos of many of the oviparous species of fish in the order Cyprinodontiformes. Activity levels of diapausing stages can vary considerably among species. Diapause may occur in a completely immobile stage, such as the pupae and eggs, or it may occur in very active stages that undergo extensive migrat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lestes Dryas
''Lestes dryas'' is a species of damselfly in the family Lestidae, the spreadwings. Its common names include emerald spreadwing, scarce emerald damselfly and robust spreadwing.Boudot, J. 2014''Lestes dryas''.The IUCN Red List of Threatened Species. Downloaded on 28 January 2016. An alternate name in Ireland is the turlough spreadwing. This species is native to the Holarctic, especially northern parts of Eurasia and North America. It is relictual in North Africa. ''L. dryas'' can tolerate extreme conditions that few other dragonflies can survive. Identification This damselfly is about 35 to 42 millimeters long, the males are generally longer than the females. The males' wingspan is about 45 millimeters and the females' about 47 millimeters.Watson, L., and Dallwitz, M. J. 2003 onwards''Lestes dryas'' (Kirby, 1890).British insects: Dragonglies and Damselflies (Odonata). Version: 1st January 2012. Like the other members of the genus ''Lestes'', both sexes of ''L. dryas'' have la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lestes Sponsa
''Lestes sponsa'', is a damselfly, with a wide Palaearctic distribution. It is known commonly as the emerald damselfly or common spreadwing. Both males and females have a metallic green colour and when resting its wings are usually half opened. Behaviour One of the larger damselflies, this species is most common in July and August. It is often found by ponds and lakes, and is very rarely seen along flowing water. Emerald Damselflies like to perch among reeds, their colour providing good camouflage. They are not as strong fliers when compared to other common damselflies such as the common blue or large red damselflies, but they are more likely to be seen on misty, rainy days then those species. When disturbed they usually do not fly very far away, landing on another perch a few yards away. Their habit of perching with their wings half open is characteristic of the family Lestidae and gives rise to their other common name of spreadwings. A population can consist of several hundre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pterostigma
The pterostigma (plural: pterostigmata) is a group of specialized cells in the outer insect wing, wings of insects, which are often thickened or coloured, and thus stand out from other cells. It is particularly noticeable in dragonfly, dragonflies, but present also in other insect groups, such as snakefly, snakeflies, hymenopterans, and megalopterans. Purpose The pterostigma, a heavier section of the wing than nearby sections, assists in gliding. Without the pterostigmata, self-exciting vibrations known as aeroelastic flutter, flutter would set in on the wing above a certain critical speed, making gliding impossible. Tests show that with the pterostigmata, the critical gliding speed is increased 10–25% on one species of dragonfly. Pseudopterostigma Some female damselfly, damselflies in the family Calopterygidae possess a ''pseudopterostigma''. This is similar in location on the wing to a true pterostigma but is crossed by veins and is only defined by its paler colour compared ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandwich Bay, Kent
Sandwich Bay is a long sweeping inlet of the sea between Ramsgate and Deal, on the east coast of Kent, England. The coastal area consists of sand flats with their associated salt marshes and coastal sand dunes. The ''Sandwich Flats'' stretch for about five miles (8 km) along the coast. The coastal habitats are of high ecological importance. Most of the bay bears national and international nature conservation designations. These include the Sandwich Bay to Hacklinge Marshes Site of Special Scientific Interest (SSSI), the Sandwich Bay Special Area of Conservation (SAC), the Thanet Coast and Sandwich Bay Special Protection Area for birds (SPA), and the Thanet Coast and Sandwich Bay Ramsar Site. The southern emerald damselfly (''Lestes barbarus'') was found here in 2003, only the second site in Great Britain at which this vagrant species had occurred. There are several Geological Conservation Review sites within the SSSI. The bay is also home to the Sandwich Bay Bird Observ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atropos (journal)
''Atropos'' is a UK-based journal for specialists in Lepidoptera and Odonata. It takes its name from the scientific name of the death's-head hawkmoth The name death's-head hawkmoth refers to any of three moth species of the genus ''Acherontia'' (''Acherontia atropos'', '' Acherontia styx'' and '' Acherontia lachesis''). The former species is found in Europe and throughout Africa, the latter ..., ''Acherontia atropos''. It was first published in May 1996. Entomology journals and magazines {{zoo-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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