The red-headed cockchafer or red-headed pasture cockchafer (Adoryphorus couloni[1][2] or Adoryphorus coulonii[3][4]) is a species of Australian scarab beetle in the genus Adoryphorus.

[1] It has become naturalised in Canterbury, New Zealand, where it was first recorded in 1963.

[2] The adult beetle is 10–15mm long, 8mm wide, and shiny reddish-brown to black.

The larva is white-grey in the early stage.

Older larva have yellowish legs and a hard red-brown head, and then become white when mature.