Definitions for water beetle

This page provides all possible meanings and translations of the word water beetle

Random House Webster's College Dictionary

wa′ter bee`tle(n.)

  1. any of various aquatic beetles, as a predaceous diving beetle of the family Dytiscidae.

    Category: Entomology

Origin of water beetle:

1660–70

Princeton's WordNet

  1. water beetle(noun)

    any of numerous aquatic beetles usually having a smooth oval body and flattened hind legs for swimming

Wiktionary

  1. water beetle(Noun)

    Any of various freshwater aquatic beetles that have a smooth oval body and flattened hind legs adapted for swimming, and that carry an air bubble underneath their abdomens.

Webster Dictionary

  1. Water beetle

    any one of numerous species of aquatic beetles belonging to Dytiscus and allied genera of the family Dytiscidae, and to various genera of the family Hydrophilidae. These beetles swim with great agility, the fringed hind legs acting together like oars

Freebase

  1. Water beetle

    A water beetle is a beetle adapted to living in water. Water beetles can only live in fresh water. Water beetles rise to the water surface and take atmospheric air into their tracheal systems. There are approximately 2000 species of water beetles. The rest marine species tend to live in the intertidal zone. Water beetles are black, brown, or greenish and .08 to 1.57 inches long. Many water beetles carry an air bubble underneath their abdomens, which both ides an air supply, and prevents water from getting into the spiracles. Others have the surface of their exoskeleton modified to form a plastron, or "physical gill", which permits direct gas exchange with the water. The hind legs are strong like the grasshoppers except it is not for jumping but for swimming. The wing covers are usually grooved on the female and smooth on the male. They have fringed hind legs with hair adapted for swimming. Adults hibernate in underwater soil during a good portion of the year. Water beetles are attracted to lights at night. Water beetles often feed on wayward insects that fall into the water and drown . Most families of water beetles have larvae that are also aquatic; many have aquatic larvae and terrestrial adults.

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