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The ones that look like males, andromorphs, are usually under a third of the female population but the proportion can rise significantly and a theory that explains this response suggests that it helps overcome harassment by males. [7] Some Coenagrionid damselflies show male-limited polymorphism, an even less understood phenomenon. [8]
Enallagma cyathigerum (common blue damselfly or common bluet) is a species found mainly between latitudes 40°N and 72°N; [2] It is widely distributed in the Palearctic, common in all European countries (including Portugal, Spain, France, Great Britain, Ireland, Germany, Sweden, Norway, Finland, Poland, etc.) and in Asia in Turkey, Iran ...
Chalcolestes viridis, formerly Lestes viridis, [2] is a damselfly of the family Lestidae. [3] It has a metallic green body [ 4 ] and at rest it holds its wings away from its body. Its common name is the willow emerald damselfly , [ 5 ] the green emerald damselfly , [ 1 ] or the western willow spreadwing . [ 6 ]
(This distinguishes it from the variable damselfly where the U-shape is joined to the terminal band with a black line.) Segments three to five are blue with broader black terminal bands, lacking the forward-pointing projection the upper surface which adult male common blue damselfly has. Segment six has a similar pattern but with more ...
The adult damselflies prey on small flying insects, caught using their legs like a basket to scoop the prey up while flying, or insects taken from leaves. Damselfly nymphs are aquatic, and prey on small aquatic insects or other aquatic larvae. A male can try to interfere with a mating pair, by attaching itself to the mating male.
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These damselflies have pale brown pterostigma on both forewing and hindwing and the pterostigma are nearer the wing tip on the forewing which means that both pterostigma can be seen with the wings closed, they do not overlap as in other damselflies. In the field this is easily seen and distinguishes Sympecma from all other damselflies. Males ...
These damselflies can easily be confused with small red damselflies, but the latter has orange legs, while the large red damselfly has black legs. In Greece and Albania a closely related species occurs, the Greek red damsel (Pyrrhosoma elisabethae). They look very much the same, the females only having a slightly different pronotum with deep ...