
The Haliplidae are a family of water beetles who swim using an alternating motion of the legs. They are therefore clumsy in water (compared e.g. with the Dytiscidae or Hydrophilidae), and prefer to get around by crawling. The family consists of about 200 species in 6 genera, distributed wherever there is freshwater habitat; it is the only extant m...
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http://en.wikipedia.org/wiki/Haliplidae

Haliplidae is the crawling water beetles family of insects of the order Coleoptera. They are tiny, boat-shaped insects less than five millimetres long, yellowish or reddish brown in colour with black markings and live among aquatic plants in slow moving or stagnant water, though they are not good swimmers, moving their legs as if walking. They feed...
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http://www.probertencyclopaedia.com/browse/BH.HTM
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