European regional assessment: Least Concern (LC) EU 27 regional assessment: Least Concern (LC) Calopteryx virgo is a common and widespread species in. Confined to southern half of Ireland. Adults fly during June and July. This and the Banded Demoiselle are the largest Irish damselfly species. The Beautiful. Calopteryx virgo virgo Trusted • Calopteryx virgo Trusted more taxon associations Calopteryx virgo britannica is a subspecies of the Beautiful Demoiselle.
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During the nesting above the water surface while the female is the male defended against other males.
Beautiful Demoiselle |
Only in very rare cases the larvae are present in stagnant water. Optimal areas correspond to the optimal nesting places for the females and are characterized by a normally increased flow and a suitable oviposition substrate in the potential breeding sites from. The development itself can be divided into three sections: Long ‘horn-like’ antennae and long thin legs of the larva distinguish this as a demoiselle. Thus they will be an indication of value in the saprobic assigned of 1.
Calopteryx virgo can reach a body length of 49—54 millimetres 1. If you think this file should be featured on Wikimedia Commons as well, feel free to nominate it. Only two species of damselfly in Britain have obviously coloured wings. The waters are usually in the immediate vicinity of forests. This species presents an evident sexual dimorphism in colour pattern. The newly hatched dragonflies spend after leaving the larval shell exuvia is the first time until full coloration in the vegetation surrounding the water body.
This can be countered by regular removal of boundary vegetation, which will also not be complete.
It is often found among fast-flowing waters. This is mainly because they absorb ivrgo oxygen caloptergx the water inefficient. This is mostly meadow and pasture streams in the area, they rarely pass through the forest.
Compared with the larvae of the banded demoiselle the larvae of the blue-wing demoiselle prefer quieter areas of the water, since slower flow causes a more effective absorption of oxygen under water. In addition, the larvae no holding facilities are against the current, and the algae and dirt particles settle to the gill lamellae are important for respiration.
Apart from the larvae of caloptetyx demoiselles are difficult to distinguish from each other, the apparent differences lie mainly in the bristles and the severity of the tracheal gills on their abdomen. Views View Edit History.
Articles with ‘species’ microformats Wikipedia articles with GND identifiers. The cooler water is a breeding, the greater the proportion of larvae that caloptedyx through the two winter periods and therefore a development of nearly two years semivoltine development. Another key factor for the occurrence of the larvae of the blue-wing demoiselle is the temperature of the water.
Richard Bartz Pages with maps. This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. In this species the wings of the mature male are very dark blue-black and those of the female are iridescent brown-green. The calopetryx leads in this way, the female to the nesting sites “Show flight” and circled it on the water once it has settled out.
Calopterryx use a striking Schwirrflug that only in the courtship will be shown, and demonstrate the underside of its abdomen raised high.
The thin-skinned, tracheogenic body attachments for oxygen uptaking from the water, under virto circumstances are still less sensitive to fluctuations in the oxygen supply. Like all these predatory dragonfly larvae live. The males who recognize the females to the reflections of the moving wings, fly towards it, once they have crossed the border area.
The eggs are laid in the stems of aquatic plants in the water level and below, where the female can submerge calopteyx to 90 minutes. The body of the larvae shows only a relatively small adjustment to the fast-flowing waters of their habitat.
Immature males show brown wings, as the metallic blue wing color develops only with age. Females lay up to eggs at a time on emergent or floating plants, often on water-crowfoot.
The following other wikis use this file: Main flight period is late May to end August. This species is rather similar to The Banded Demoiselle Calopteryx splendensother British damselfly with coloured wings. The males rest on bankside vegetation waiting for females.