Q.Pneumatic bone is found in

Columba livia (Phylum Chordata, Class Aves, Order Columbiformes) has a compact, boat-shaped, streamlined body divided into head, neck, trunk and tail, with a toothless beak, a cere over the nostrils, protected eyes (with a nictitating membrane), and a preen (uropygial) gland at the tail base that waterproofs the feathers. The forelimbs are modified into wings (brachium, ante-brachium, manus) while the hind limbs alone bear the body's weight on the ground. The skeleton is light yet strong, with many pneumatic (air-filled) long bones and a deeply keeled sternum that anchors the flight muscles; feathers (quill, contour and filoplume types, arranged in a pattern called …