Name: Great Diving Beetle
Scientific name: Dytiscus spp
Nature Stars: 50
About: A very large diving beetle, about 3.5cm long. Blackish green in colour, with a yellow border to the thorax and around the wing cases. Great Diving Beetles are voracious predators in ponds, feeding on many smaller invertebrates, tadpoles and even small fish. The larvae are large, fearsome looking beasts with big biting jaws: they look a bit like pale brown, underwater Devil's Coach Horses.
How to identify: One of our largest beetles.
Fantastic fact: The female Great Diving Beetle has a series of deep grooves running along her wing cases. The male is smooth, but has big suckers on his front feet.
Photograph credit: Jack Perks