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Anax immaculifrons, [2] the magnificent emperor, [1] or blue darner, [3] is a species of dragonfly in the family Aeshnidae.Almost all its range is in West and South Asia (the population further east in Asia is now recognized as a separate species, A. aurantiacus); it is Europe's largest dragonfly but very marginal in the continent where restricted to some Aegean Islands and Cyprus.
Crocothemis nigrifrons is a species of dragonfly in the family Libellulidae. [3] Its common names include black-headed skimmer and blue-scarlet dragonfly. [4] It is found in Australia, Papua New Guinea, and the Solomon Islands. The male is blue and black, and the female is yellow to brown in color. [4]
It is a medium sized dragonfly with dark face and greenish blue eyes. The thorax of old males are dark blue due to pruinescence. Its wings are transparent with dark amber-yellow tint in the extreme base. Its abdomen is pruinosed with blue color up to segment 8; last two segments are black.
A particular perch may give a dragonfly a good view over an insect-rich feeding ground; males of many species such as the Pachydiplax longipennis (blue dasher) jostle other dragonflies to maintain the right to alight there. [50] Defending a breeding territory is common among male dragonflies, especially in species that congregate around ponds.
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 ...
The blue corporal is a small, thickset dragonfly, measuring 29–40 mm (1.1–1.6 in) in length. [8] The male has a dark brown thorax with two wide, bluish, pruinose stripes on the front and a pruinose blue abdomen. His face is black, and his eyes dark brown.
Orthetrum caledonicum, the blue skimmer, [3] is a common Australian dragonfly in the family Libellulidae. [4] [5] Males have a powder blue thorax and abdomen pruinescent blue when mature. The females are brownish grey in colour while the teneral are yellow with black markings. They are medium in size, with a body length of 4.5 cm (2 in) and a ...