Cait & the Critters A Digital Atlas of Animal Life · Species, behaviour, habitats & stories
Insects

Emperor Dragonfly

Anax imperator

Least Concern

Fast Facts

Lifespana few weeks as an adult, up to 2 years as a larva
HabitatWetlands
DietCarnivore — flying insects such as butterflies, flies and smaller dragonflies
ActivityDiurnal
Size7–8 cm long, 10 cm wingspan
Weightunder 1 g

About

The emperor dragonfly is one of the largest and most powerful dragonflies in Europe, the male sporting a vivid sky-blue abdomen and the female a green one. A commanding aerial predator, it patrols ponds, lakes and canals with tireless, darting flight.

Its enormous compound eyes, which nearly meet across the top of the head, give it near all-round vision for spotting prey on the wing.

Behaviour

Emperor dragonflies catch and often eat their prey entirely in mid-air, scooping up insects with their spiny, basket-like legs. Males aggressively defend stretches of water against rivals.

The aquatic larva is a fearsome underwater hunter in its own right, seizing tadpoles and small fish with a rapidly extending jaw before emerging to transform into the winged adult.

Did you know?

  • Dragonflies are among the most successful predators in nature, catching most prey they pursue
  • Each compound eye contains tens of thousands of individual lenses
  • The larva can shoot out a hinged lower jaw to grab prey in an instant
  • They can fly backwards, hover and change direction with astonishing agility

Distribution

Europe, North Africa and parts of western and central Asia

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