≡
Hydrous piceus
EN · great silver water beetle
DE · Große Kolbenwasserkäfer
LV · lielais ūdensmīlis
PL · kałużnica czarnozielona
This beetle is among the largest aquatic insects. Adults can reach up to 5 cm in length and 2 cm in width. The larvae is up to 7 cm long. The body of adults is black with a greenish or olive sheen. It has protruding eyes and reddish-black antennae.
Infraorder: Staphyliniformia
Superfamily: Hydrophiloidea
Family: Hydrophilidae