The Birds of Australia London, Witherby & Co, 1910-1927. Australia Bibliography Birds Birds Australia Pictorial works Bird Mathews, Gregory Ornithology Petrophassa albipennis White-quilled Rock Pigeon, A detailed illustration of a bird known as Petrohassa alpinensis, showcasing its distinctive features. The bird stands on a rocky surface, its plumage predominantly dark brown with subtle variations. A notable white patch on its tail contrasts with the darker tones of its body. The background suggests a natural rocky habitat, enhancing the birds connection to its environment. Beneath the illustration, the name 'Petrohassa alpinensis' is clearly labeled, indicating its scientific classification. The overall composition highlights the elegance and characteristic traits of this species, reflecting its alpine habitat.