Hardhead illustration
Birdsong field guide

Hardhead

Aythya australis

The Hardhead is Australia's only true diving duck, characterized by its deep chocolate-brown plumage and conspicuous white underwing patches visible in flight.

What it sounds like

Usually silent, but males may produce a soft, wheezy whistle during courtship, while females emit a harsh, low croak.

Reference call, compare with what you heard
0:00 / --:--
Rec. Andrew Spencer · AustraliaCC BY-NC-NDXeno-canto

Field notes

  • It is the sole representative of the diving duck genus Aythya native to the Australian continent.
  • Adult males possess a striking white iris, a feature that earned the species the alternative name 'White-eyed Duck'.
  • The name 'Hardhead' originated from early taxidermists who found the bird's skull remarkably difficult to process.
  • Unlike most Australian ducks, they rarely come ashore and prefer to spend nearly all their time on open water.
  • They are highly nomadic and can travel thousands of kilometers to exploit temporary inland water sources following heavy rains.
Habitat
Deep, permanent freshwater lakes, reservoirs, and heavily vegetated swamps; occasionally found in brackish coastal lagoons.
Range
Widespread across Australia, particularly in the south-east, with populations also in New Guinea, New Zealand, and Pacific islands.

Similar & commonly confused birds

Heard a Hardhead?

Open Birdsong, tap record, and identify the bird singing near you in seconds — then collect it in your field journal.

Identify a bird by its song