Emperor (dragonfly)

Emperor dragonfly
Male
Puerto de la Cruz, Tenerife
female
Whitecross Green Wood, Oxfordshire
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Odonata
Family: Aeshnidae
Genus: Anax
Species: A. imperator
Binomial name
Anax imperator
Leach, 1815
Synonyms

Anax mauricianus
Anax mauritianus (lapsus)

The emperor dragonfly[2] or blue emperor[1] (Anax imperator) is a large species of hawker dragonfly of the family Aeshnidae, averaging 78 millimetres (3.1 in) in length.[2] It is found mainly in Europe and nearby Africa and Asia.

Behaviour

They frequently fly high up into the sky in search of prey, which includes butterflies, Four-spotted Chasers and tadpoles; small prey is eaten while flying. They breed in a variety of aquatic habitats from large ponds to dykes, but they require a plentiful supply of vegetation in the water. The females lay the eggs into plants such as pondweed, and always lay alone. The male is highly territorial, and difficult to approach.[3] In the summer months Emperor dragonflies are frequent visitors to gardens, being especially prevalent in the southern counties of Great Britain.

Identification

When they first emerge, both sexes appear pale green with brown markings. The legs are brown with a yellow like base. Wings are born black but grow yellow-brown with age. Males have a sky blue abdomen marked with a diagnostic black dorsal stripe and an apple green thorax. The thorax and head of a male is green and their prominent eyes are blue. Females have similar markings but they are mainly green.[3]

References

This article is issued from Wikipedia - version of the 11/11/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.