Insects · Odonata · Aeshnidae

Emperor Dragonfly

Anax imperator

Not Evaluated

It has not yet been assessed against the IUCN criteria. See full glossary

The emperor dragonfly is an anisopteran dragonfly of the family Aeshnidae. It can reach 8 cm in length and a wingspan of 12 cm, and it lives in wetlands.

Size

up to 8 cm

Lifespan

2 years

Diet

Carnivore

Feeds mainly on other animals.

Activity

Diurnal

Active mainly during the day.

Social structure

Solitary

Lives and hunts alone, joining others only to breed.

Sighting difficulty

Unknown

Fun facts

  • It hunts without landing: it forms a basket with its legs in which it traps mosquitoes, butterflies and other dragonflies, and devours them on the wing.
  • Its eyes, with tens of thousands of facets, give it almost spherical vision and an ability to anticipate the prey's trajectory that is studied in robotics and artificial intelligence.
  • The female lays her eggs alone, inserting them into floating plant tissue, without the escorting male that accompanies other species.
  • It is Europe's largest dragonfly: up to 8 cm of body and 11 of wingspan.
  • It hunts in the air and eats in the air: it seizes butterflies, other dragonflies and flies in mid-flight and, if the prey is small, eats it without landing.
  • It is among the most effective flying insects in existence. Dragonflies achieve extraordinarily high capture rates because they compute an interception course rather than chasing the prey: they predict where it will be and head for that point.
  • It flies at more than 30 km/h and patrols a territory almost incessantly, driving out any other large dragonfly that enters.
  • It spends most of its life underwater: the larva is aquatic and predatory for one or two years, and the adult flies for only a few weeks.
  • The larva hunts with a mask: a hinged lip it shoots forward in milliseconds to seize tadpoles, insect larvae and crustaceans.
  • Since the 1990s its range has been shifting towards northern Europe with the warming climate.

Life cycle & biology

Skeleton type
Invertebrate - chitin exoskeleton (insect)
Habitat & environment
Lagoons, ponds, reservoirs and canals with submerged vegetation

Sources consulted: https://es.wikipedia.org/wiki/Anax_imperator

Where to watch it

Parks and dive sites where this species has been documented.

Related species

Other species in the catalogue with the most in common with Emperor Dragonfly — same habitat, park, country, tags or family.

Keep exploring

Based on what we already know about emperor dragonfly.

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