One out of Every Four Animals on Earth Is a Beetle . Movement: Swimmers using hind legs as oars. The larva, like the adult, breathes through spiracles on its abdomen and hangs suspended from the water surface film. Some species occur in ponds and lakes, others are more common in rivers and streams. Summary 2 Dytiscidae – based on the Greek dytikos (δυτικός), "able to dive" – are the predaceous diving beetles, a family of water beetles.They are about 25 mm (one inch) long on average, though there is much variation between species. Diving beetles are oval and flat and range in length from 1.5 mm to … Two important worldwide genera (Dytiscus and Cybister) are more than 35 mm (1.4 inches) long and are raised and eaten in the Orient. ", Food - Small aquatic vertebrates and invertebrates, Habitat - Various freshwater, depending on species, Life Cycle - Four developmental stages: egg, larva, pupa, adult (complex, or complete, metamorphosis); adult females attach eggs to underwater plants; upon hatching, larvae are free-swimming, are fully aquatic, and molt (shed their body covering) several times before leaving the water to pupate underground near the water; adults emerge in warm months, and are the overwintering stage for most species. The Diving Beetle is a multi-colored insect with many different types of species. Description - Smooth, "fusiform" (football shaped) body; front wings hardened, protect back wings when not in flight; threadlike antennae, usually less than ¼ length of body; third pair of legs oarlike, adapted for swimming; chewing mouthparts; body usually dark colored - brown, black, or dark green, some species with light-colored spots and patterns. Both genders fly very well outside of water and are attracted to lights at night. But it can be confused with another kind of insects especially with true bugs. However; you can see variations of length among the species of diving beetles. I’ve found dytiscids (the predaceous diving beetles) to be the easiest, most active, and most enjoyable beetles to keep. Fun Facts - Although larval diving beetles have gills, the adults do not. They occur in virtually any freshwater habitat around the world, but a few species live among leaf litter. Scientists have described over 350,000 species of beetles, with many more still undiscovered, … Life cycle: Diving beetles undergo complete … Predaceous diving beetle, (family Dytiscidae), also called diving beetle, or true water beetle, any of more than 4,000 species of carnivorous, aquatic beetles (insect order Coleoptera) that prey on organisms ranging from other insects to fish larger than themselves. But it is easy to recognize the beetle if you know the few characteristics. Because larval predaceous diving beetles are such voracious predators, they have earned the nickname "water tigers. 42 Obnoxious Facts about Michael Scott . Looking for Predaceous diving beetle? The larvae are elongated, flattened and can be 2 inches long. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Explanation of Predaceous diving beetle … All have a smooth, oval shape with strong, paddle-like hind legs that propel them easily in … The body is elongate-oval and flattened; less frequently it is convex. This arthropod is a very "successful predator hunting and eating prey to live." Diving beetle larvae pupate in moist ground. The Three-punctured Diving Beetle lives in still waters including ponds, lakes and river pools. A Predaceous Diving Beetle feeds on other aquatic insects and creatures, including small tadpoles. 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