The southern hawker or blue hawker (''Aeshna cyanea'') is a species of hawker dragonfly.

Distribution

The species is one of the most common and most widespread dragonflies in Europe. The total range is West Palearctic and covers a large part of Europe (to Scotland and southern Scandinavia in the North to Italy (without the Southwest) and the northern Balkans to the South); the Eastern boundary is formed by the

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and the West by Ireland. It is also found in Northwest Africa (Algeria). In Central Europe the species is very common.

Habitat

These dragonflies mainly inhabit well-vegetated, small ponds and garden ponds, but they wander widely, and they are often seen in gardens and open woodland.

Description

Aeshnidae - Aeshna cyanea (male close-up)

''Aeshna cyanea'' can reach a body length of about ,British Dragonflies
/ref> with a wingspan up to .Richard Robinson Askew, The Dragonflies of Europe, Harley Books, 2004, p. 109. It is a large, brightly coloured dragonfly, with a long body. The thorax is brown, with two ante-humeral wide green longitudinal stripes. On the forehead there is a black spot in the form of the letter T. The wings are hyaline with a dark pterostigma. The leading edge of the wings is dark. Males have a dark abdomen with bright apple green markings, except for the last segments S8-10 of the abdomen, where the markings are pale blue and joined. In the females, the abdomen is brownish with bright green markings. The eyes of the males are blue or greenish-blue, while in the females they are yellowish green or brownish.

Biology and behavior

Flight period of these insects lasts from June to October, with some specimen visible in May and November. The adults of the southern hawker feed on various

insect Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body ( head, thorax and abdomen), three ...

s, caught on the wing. This is an inquisitive species and will approach people. These dragonflies breed in still or slow-flowing water. The males are often seen patrolling by a ponds edge or river, where they fight away intruders, crashing into rival males and spiralling through the air. The females are quite inconspicuous when they lay their eggs, but they sometimes give away their spot by clattering up from the reeds. The eggs are laid by jabbing the abdomen into rotting vegetation or wood. The eggs hatch in the spring, after being laid in the previous summer or autumn. The nymphs feed on aquatic insects, small tadpoles, invertebrates and small fish. They emerge as adults in July and August after two-three years’ development.

Life cycle

File:SOUTHERN HAWKER DRAGONFLIES.jpg, Mating File:Female Blue Hawker ovipositing. - Flickr - gailhampshire.jpg, Female ovipositing File:Aeshna cyanea - larva (aka).jpg, Larva File:MosaikJungferExuvie09.JPG, Female freshly emerged with larva skin File:Aeshnidae - Aeshna cyanea (exuvia).JPG, Exuvia File:Southern hawker dragonfly (Aeshna cyanea) immature male.jpg, Immature male File:Aeshna cyanea - young male (aka).jpg, Immature female File:Southern hawker (Aeshna cyanea) male, blue form.jpg, mature male, blue form File:Thomas Bresson - Aeshna cyanea-1 (by).JPG, In flight File:DragonFlyOnSteelPole.jpg, Mature Female Aeshna cyanea.webm, Female eats a wasp

References

External links

* * {{Taxonbar, from=Q505187 Aeshnidae Odonata of Africa Dragonflies of Europe Insects described in 1764 Taxa named by Otto Friedrich Müller