White-quilled Rock-Pigeon Petrophassa albipennis

Large rusty brown pigeon with faint pale speckles on its plumage. In flight shows white wing panels, and flies with a loud clattering of wings. Found only on the sandstone areas of the Kimberley and Ord-Victoria regions. Often roosts on high rocky cliffs or on top of sandstone towers; comes down to the sandy ground in the early morning and evening.