The Vietnamese crested argus (Rheinardia ocellata) is a large and spectacular peafowl-like species of bird in the pheasant family with dark-brown-spotted black and buff plumage, a heavy pink bill, brown irises and blue skin around the eyes.

[3] Both sexes are similar in size, with females possessing a prominent marbled barring and more colourful dorsal plumage than the male.

A shy and elusive bird, the Vietnamese crested argus is found in submontane primary forests of Vietnam and Laos in Southeast Asia.

The male performs various displays utilizing serpentine erratic deportment behaviors, which include perceptible quill vibration.

The lower extremities of the male's wings and tail are pushed vertically into the ground leaving trails in sand and leaf litter.

From limited anecdotal observations of local indigenous peoples, the species selects nest sites in elevated reaches, often amongst escarpments on steep slopes amongst leaf litter.

Due to ongoing habitat loss as well as overhunting in some areas, the Vietnamese crested argus is evaluated as Critically Endangered on the IUCN Red List.