White-quilled Rock-Pigeon RL

White-quilled Rock-Pigeon
Petrophassa albipennis

References
Cornell Laboratory of Birds of the World , esp. The Key to Scientific Names Edited by James A. Jobling
David W. Winkler, Shawn M. Billerman, Irby J. Lovette, Bird Families of the World  (Lynx Edicions, 2015).
Peter Menkhorst et al, The Australian Bird Guide (CSIRO, 2017).
George Adams, The Complete Guide to Australian Birds​ (Viking, 2018)

White-quilled Rock-Pigeon RL

A bird that inhabits the sandstone escarpments in the Kimberley and Ord-Victoria regions of northern West Australia and the Northern Territory, the White-quilled Rock-Pigeon is a plump ground-dwelling bird with a long tail, beautiful if subtle marking on the head, neck, and back, and a white wing patch that shows in flight. There is considerable individual variation, with some birds appearing more dusky grey and others more reddish brown; former appear to be mainly females. Juvenile closely resembles adult, but has narrow rufous margins to upperwing-coverts.
Its scientific name Petrophassa is a straightforward combination of the Greek for  rock (petra) and the Greek for pigeon (phassa). Albipennis is Latin for white quilled.