water beetle


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Related to water beetle: Water scavenger beetle

water beetle,

name for aquatic beetlesbeetle,
common name for insects of the order Coleoptera, which, with more than 300,000 described species, is the largest of the insect orders. Beetles have chewing mouthparts and well-developed antennae.
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 of several families. They should not be confused with water bugswater bug,
name for a large number of water-living bugs, comprising several families of the order Hemiptera (true bugs). All have jointed, sharp, sucking beaks, breathe air, and undergo gradual metamorphosis (see insect).
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, which are true bugs (order Hemiptera). The predaceous diving beetles (family Dytiscidae) are a large group, widespread in quiet streams and ponds. They are black, brown, or greenish, .08 to 1.57 in. (3–40 mm) long, with smooth oval bodies and hairy, oarlike hind legs. There is a cavity beneath the wings for holding an air supply, so the diving beetle can remain submerged for long periods; however, the insect often hangs head down from the surface, exposing the openings (spiracles) of the last two of its breathing tubes, located at the tip of the abdomen. Both the adults and the long, conspicuously segmented larvae prey on a variety of animals, including snails and fish much larger than themselves. Adults of most species are strong fliers, and many are attracted to lights at night. The water scavenger beetles (family Hydrophilidae), of similar appearance, are abundant in marshy places in warm parts of the world and feed on water plants and decaying matter. Their larvae are predaceous. The whirligig beetles (family Gyrinidae) are oval, shiny, blue-black to dark brown beetles, about 3/4 in. (19 mm) long. They are found in groups in sheltered places, spinning around on the surface of the water. They feed on small insects on the surface and seldom dive. There are several other groups of water beetles, all classified in the phylum ArthropodaArthropoda
[Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans, insects, centipedes, millipedes, spiders, scorpions, and the extinct trilobites.
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, class Insecta, order Coleoptera.
References in periodicals archive ?
In recent years, water beetles have been gaining attention in monitoring programmes and environmental assessments, due to the sensitivity of some families to environmental change (Hilsenhoff, 1977; Ribera and Foster, 1992; Ribera, 2000; Garcia-Criado and Fernandez-Alaez, 2001; Compen and CErEghino, 2003).
Andrew Gresty (pictured), his parents and gran have won a New Holland Beautiful Farm award for environmental stewardship at The Cloy farm near Overton on Dee - underlined by the discovery of colonies of the rare lesser silver water beetle (left) Main picture: ROBERT PARRY JONES :rj020108AndrewGresty-3
Beginning 11 m upstream of the recession point, we observed thousands of adult long-toed water beetles Postelichus immsi (Coleoptera: Dryopidae) crawling upstream in a 37 m-long column along the shallow river margins (Fig.
This volume in the series focuses on the Elmidae, or riffle beetles, a moderately large cosmopolitan family of true water beetles, for which there has been no worldwide catalogue since 1910.
However different kinds of Fish, Insects and Turtles, crabs, water beetles, Leeches, Moleskins and other invertebrates, hydrophytes etc are found in abundance.
Scientists who have studied the nutritional value of edible insects have found that red ants, small grasshoppers and some water beetles pack enough protein to rank with lean ground beef while having less fat per gram.
During my travels, I have eaten crickets, termites, water beetles, ants and grubs.
From aquatic spiders, to dragon flies to those little black water beetles that run around like their steering wheels are broken, bugs equal bluegill.
The Big Pond Dip results, published by Pond Conservation, show that two thirds of ponds had breeding dragonflies and damselflies, and three quarters of them contained water snails, pond skaters and water beetles.
Effort Remove dead leaves, spent flowers of water lilies and aquatic plants, then leave the debris at the side of the pool to allow water beetles to crawl back into the pond before disposing of it in the compost bin.
Remove dead leaves of water lilies and other aquatic plants, then leave the debris at the side of the pool to let water beetles crawl back to the pond before putting it in the compost bin.
Giant water beetles have the least amount of fat per serving.