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Aeshna canadensis, Canada darner; Aeshna clepsydra, mottled darner; Aeshna constricta, lance-tipped darner; Aeshna eremita, lake darner; Aeshna interrupta, variable ...
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 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.
Aeshna caerulea (Ström, 1783) – azure hawker [5] Aeshna canadensis Walker, 1908 – Canada darner [7] Aeshna clepsydra Say, 1839 – mottled darner [7] Aeshna constricta Say, 1839 – lance-tipped darner [7] Aeshna crenata Hagen, 1856 – Siberian hawker [2] Aeshna cyanea (Müller, 1764) – blue hawker, [2] southern hawker [5]
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.
Common worldwide or nearly worldwide genera are Aeshna and Anax. Anax includes some of the largest dragonflies, including the North American A. walsinghami, Hawaiian A. strenuus, European A. imperator and A. immaculifrons, and African A. tristis, but these are all exceeded by another member of the family, the Asian Tetracanthagyna plagiata, which by wingspan and weight is the world's largest ...
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.