Animal Species:Three-punctured Diving Beetle

The large Three-punctured Diving Beetle lives under the water by breathing air stored beneath its wing cases.

Three-punctured Diving Beetle

Andrew Donnelly © Australian Museum

Standard Common Name

Three-punctured Diving Beetle

Size range

2 cm - 2.3 cm

Distribution

The Three-punctured Diving Beetle is found hroughout Australia (except the south coast and Tasmania). There are about 20 species of predacious diving beetles (family Dytiscidae) in the Sydney region.

Habitat

The Three-punctured Diving Beetle lives in still waters including ponds, lakes and river pools.

Feeding and Diet

Three-punctured Diving Beetles are voracious predators, feeding on other insects, tadpoles and even small fish. The larvae are just as fearsome and capture their prey with piercing, grooved jaws through which they inject liquefying digestive juices. The prey 'soup' is then sucked up through the grooved jaws. The adult beetles have a powerful defensive chemical that they release to stun nearby fish.

Other behaviours and adaptations

Adult Three-punctured Diving Beetles fly great distances at night searching for water. They are also attracted to streetlights.

Classification

Species:
tripunctatus
Genus:
Cybister
Subfamily:
Dytiscinae
Family:
Dytiscidae
Superfamily:
Caraboidea
Suborder:
Adephaga
Order:
Coleoptera
Class:
Insecta
Subphylum:
Uniramia
Phylum:
Arthopoda
Kingdom:
Animalia

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Tags beetles, insects, arthropods, invertebrates, wildlife of sydney, identification,