Emperor Dragonfly

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Emperor Dragonfly
Anax imperator
Size
66–84 mm body; 97–106 mm wingspanUK's largest dragonfly — wingspan the width of your hand
Weight
1 gAbout the weight of a paperclip
Lifespan
1–4 years as larva; 4–6 weeks as adult
Rarity
Common
M vs F
Males are sky blue with a black dorsal stripe; females are green — both large and powerfully built
Habitat
Large lakes, ponds, gravel pits, slow rivers with open water and emergent vegetation
Best time
June–August
Conservation
UK: Green LC
💡 Did you know?
The Emperor Dragonfly is one of the most powerful aerial hunters in the world — it catches prey in mid-air with a success rate of over 90%, far higher than most birds of prey
Larvae (nymphs) are ambush predators that can shoot out a hinged jaw (the "mask") in 25 milliseconds to catch tadpoles, small fish and other invertebrates
Often confused with
Hairy Dragonfly (smaller hairy thorax emerges earlier) Blue-tailed Damselfly (much smaller slender)
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