There is a family of water beetles, Dytiscidae, known as Predaceous Diving Beetles. It’s been a while since I’ve done an identification post, so it’s time for a new one! In fact, there are over 500 in North America and over 5,000 worldwide. The Great diving beetle is a very large diving beetle that can be found in ponds and slow-moving water. The meaning is able to dive. They don’t hesitate to attack prey larger than themselves, delivering a sharp bite with their jaws to small fish, tadpoles and frogs. With the name predaceous, I decided they weren't to be handled. Today I’m going to focus on two aquatic beetle groups that a lot of people have a hard time telling apart from one another: the predaceous diving beetles (family Dytiscidae, the dytiscids) and the water scavenger beetles (family Hydrophilidae, the hydrophilids). The latter surface for air head first and have a ridge or keel on the underside that runs down the thorax and extends into a point. • Body hardened and convex on top and bottom (Water scavenger beetles are concave on bottom) • Often rest hanging into water with tip of abdomen at surface • 2 long antennae • Short finger-like mouth parts, not visible from above. They eat a variety of aquatic prey like other insect larvae and naiads. Predaceous Diving Beetles are also called water tigers. It is a voracious predator, hunting smaller invertebrates, tadpoles and even small fish. B oth adult diving beetles and the larvae (the "water tigers") can bite people, but their bites do not usually hurt people or make them sick. Dytiscidae – based on the Greek dytikos "able to dive" are the predaceous diving beetles, a family of water beetles. Common name(s): Predacious Diving Beetle. However, this group has historically received little scientific attention to its systematics or its ecology within the aquatic invertebrate community. Life History: • Primarily found in shallow, weedy, still water • … One of the members of a family of water beetles is explained on Facts about Diving Beetles. Life Cycle: Adults and larvae are found in water. Diving Beetle resin replica measures 2" long x 1.25" wide. However, if there are too many diving beetles in a pond or lake, they reduce the number of fist that live there because they eat the baby fist (baby fish are called "fry"). 25 come in each pack. However; you can see variations of length among the species of diving beetles. It is oval shaped and small. Predaceous Diving Beetles Seeking Prey. We've nicknamed the bug you see above, the predacious diving beetle, "zippity." The larvae are large, fearsome-looking beasts, with big, biting jaws: they look a … Predaceous diving beetles (Dytiscidae) are a moderately speciose family within the most speciose order of insects (Coleoptera). The predacious diving beetle is a seldom seen but very common aquatic insect. The predaceous diving beetles are called Dytiscidae. As their name implies, these beetles are predatory. On average, it has the length of 1 inch or 25 mm. Barb immediately identified them as predaceous diving beetles (PDB). Predacious Diving Beetles (a type of water beetle) are encrusted in hard dirt are ready to be excavated and discovered by young paleontologists. Good decision... their "bite" injects digestive juices, like many other beetles and bugs such as the assassin bug, digesting their prey within its body before sucking the nutrition out of them. Predaceous diving beetles are easily confused with water scavenger beetles (Coleoptera: Hydrophilidae). 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