Best time to see: early Jun to late Aug
Key facts
The largest British dragonfly, fast-flying and the male deep blue
Large well-vegetated ponds, lakes and gravel pits, and sometimes ditches and canals
Widespread in southern England and Wales
Recognition
The largest British dragonfly with a wingspan of 10.5 cm; male with deep blue, female with greenish abdomen
Patrols tirelessly at speed up and down stretches of water in search of prey
Flies from early June to late August, feeding on almost any flying insect including smaller dragonflies
Lifecycle
Females lay eggs into aquatic plants often far from the water's edge, and these hatch in about three weeks
After hatching, the larvae prey on a wide range of underwater creatures, remaining in the water for up to two years
Larvae climb a plant stem in early summer then split their skins and emerge as a fully grown adult
© Hugh Venables
© Andy McGeeney