Trumpeter swan was still capable of flight due to its bulk. The adult trumpeter swan is all white in plumage. Like mute swan cygnets, the cygnets of the trumpeter swan have light grey plumage and pinkish legs, and gain their white plumage after about a year. As with a whooper swan, this species has upright posture and generally swims with a straight neck. The trumpeter swan has a large, wedge-shaped black bill that can, in some cases, be minimally lined with salmon-pink coloration around the mouth. The bill, measuring , is up to twice the length of a Canada goose's ("Branta canadensis")
Trumpeter finch laid in a nest in a rock crevice. This gregarious terrestrial finch's food is mainly seeds, and, particularly in the breeding season, insects. The trumpeter finch is a small, long-winged bird. It has a large head and short, very thick bill. The summer male has a red bill, grey head and neck, and pale brown upper parts. The breast, rump and tail are pink, the last having dark terminal feathers. Winter males, females and young birds are a very washed-out version of the breeding male. The song of this bird is a buzzing nasal trill, like a tin trumpet. There