This very small diving beetle is patterned with black and yellow blotches (3). It is beautifully adapted for life in water, with a sleek, streamlined body and modified hair-fringed hind legs, which are used as paddles (4).
This beetle is found only in western parts of Britain, and was once found from the Solway area as far south as Devon. Since 1908 there have been no records of this species in southern England, but it was found in 1981 in Cheshire (2). It has recently been recorded from four rivers in Wales, and there are historic records from two others. In Scotland it is currently known from only one of five rivers it has been recorded from in the past (5). Elsewhere, this beetle is found in southern Ireland, the Canaries, North Africa, central Europe, Switzerland, Austria, Italy and the Balearics (2).
This beetle is a priority species under the UK Biodiversity Action Plan (UK BAP), and a Species Action Plan has been produced to guide its conservation; the Environment Agency is the 'lead partner' responsible for coordinating efforts to conserve this species (1).
Of the stage in an animal's lifecycle after it hatches from the egg. Larvae are typically very different in appearance to adults; they are able to feed and move around but usually are unable to reproduce.
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