Predacious Diving BeetlePredacious Diving Beetle
| Republic of Equatorial Guinea 1978 | Czechoslovakia 1962 | Finland 1996 | Czechoslovakia 1992 |
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| Predacious Diving Beetle Dytiscus dytiscus (Dytiscidae) |
Eupopean Great Diving Beetle Dytiscus marginalis (Dytiscidae) |
Eupopean Great Diving Beetle Dytiscus marginalis (Dytiscidae) |
Predacious Diving Beetle Dytiscus latissimus (Dytiscidae) |
| British Tristan da Cunha 1993 | Singapore 2011 | Republic of Korea 1991 | Tuvalu 2012 | United States of America 1999 |
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| Predacious Diving Beetle Senilites tristanicola (Dytiscidae) |
Diving Beetle Cybister rugosus (Dytiscidae) |
Great Diving Beetle Cybister japonicus (Dytiscidae) |
Lesser Diving Beetle Acilius sulcatus (Dytiscidae) |
Spotted Water Beetle Thermonectus marmoratus (Dytiscidae) |
| Hungary 1954 |
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| Great Silver Water Beetle Hydrophilus piceus (Hydrophilidae) |
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| Great Diving Beetle Cybister japonicus (Dytiscidae) (COLEOPTERA) |
A form is a spindle shape and its back is flat. The point that convenience is good long hair being located in a line with the point which stores air between a front shuttlecock and an abdomen and breathes, and brawny hind legs, writing water underwater, and obtaining impelling force etc. is the feature of Predacious Diving Beetle. An imago and a larva inhabit underwater , such as a pond, a swamp, and a brook. By meat diet nature, it preys on underwater Insecta, frogs, small fish, etc.
On the other hand, a Water Beetle friend can distinguish from Predacious Diving Beetle of other aquatic lives at the point that the tip of Section 3 of an antenna becomes round, the point that the mustache of a mouth is long, etc. Swimming preys on the small Insecta of other larva not much well, and an imago eats an underwater alga etc.
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