Large, cryptically patterned chickenlike bird of puna grassland and bogs in the high Andes. Usually seen in trios or family groups (males take care of the young); fairly common where not hunted, but mostly wary of people. Very heavy bodied and runs strongly; very rarely flies. Striped head and dark rusty belly are diagnostic plumage features. Loud, shrieky, and rollicking choruses carry far in the thin air of the altiplano.