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Aeshna canadensis, Canada darner; Aeshna clepsydra, mottled darner; Aeshna constricta, lance-tipped darner; Aeshna eremita, lake darner; Aeshna interrupta, variable ...
The migrant hawker (Aeshna mixta) is one of the smaller species of hawker dragonflies. It can be found away from water but for breeding it prefers still or slow-flowing water and can tolerate brackish sites. The flight period is from July to the end of October. A. mixta occurs in North Africa, southern and central Europe to the Baltic region.
The common hawker, [2] moorland hawker [1] or sedge darner [1] (Aeshna juncea) is one of the larger species of hawker dragonflies. It is native to Palearctic (from Ireland to Japan) and northern North America. The flight period is from June to early October. It is 74 millimetres (2.9 in) long with a brown body.
The emperor dragonfly [2] or blue emperor [1] (Anax imperator) is a large species of hawker dragonfly of the family Aeshnidae. It is the largest dragonfly in most of Europe, including the United Kingdom, [ 2 ] although exceeded in some areas by other species.
Aeshna canadensis, the Canada darner, is a species of dragonfly in the family Aeshnidae. It is common throughout southern Canada and the northern United States. [2] [3]
Its common name in English is green-eyed hawker. In the United Kingdom it is a localised species, and is called the Norfolk hawker . Aeshna isoceles is brown, with green eyes, clear wings, and a yellow triangular mark on the second abdominal segment which gave rise to its scientific name .
The adults of the southern hawker feed on various insects, caught on the wing. This is an inquisitive species and will approach people. [5] 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.
Insect migration is the seasonal movement of insects, particularly those by species of dragonflies, beetles, butterflies and moths. The distance can vary with species and in most cases, these movements involve large numbers of individuals.