The banks of flowing waters, where there is

mud periodically washed by the stream, support

large populations of many beetle families.

Dryopidae, Heteroceridae, Hydrophilidae,

Limnichidae, Hydraenidae, Staphylinidae, and

Carabidae can be abundant in temperate stream

banks, and can be collected by standing in the

stream and splashing water onto the mud, which

brings them out of their burrows. In the tropics,

larger carabids such as the genera Scarites and

Galerita and tiger beetles (Cicindelinae) can be

found in such situations.

left | Amphizoa sinica

(Amphizoidae) Discovered

in China in 1991, this is one

of only five species of trout

stream beetles.

below | Sclerocyphon secretus

A water penny (larva of

Psephenidae) under a rock in

a waterfall stream in Tasmania.