Great diving beetle

Dytiscus marginalis
Predaceous diving beetles (Dytiscidae)

♀ swimming.
Great diving beetleon RikenMon's Nature.Guide

CC-BY 2.0 rights : Gailhampshire

Oval shaped dark brown water beetle, yellow edges along the neck and back shield, yellow legs that are well adapted to swimming. The ♂ has a smooth shield, ♀has a ribbed shield. The ♂ also has sucking feet used to control the ♀ while mating.

Able swimmer and flyer, walking is awkward. Hunts for insects, larvae and small fish.

⇔ l. 27-35 mm

Submerged, colours are hard to see making it difficult to distinguish some of the species.

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