Trumpeter swan which is apparent even when the swan is not standing or swimming upright) and larger, wedge-shaped bill as compared to the tundra swan. Trumpeter swans have similar calls to whooper swans and Bewick's swans. They are loud and somewhat musical creatures, with their cry sounding similar to a trumpet, which gave the bird its name. Beginning in 1968, repeated in 1975, and then conducted at 5-year intervals, a cooperative pan-continental survey of trumpeter swans was last conducted in 2015. The survey assesses trumpeter swan abundance and productivity throughout the entire breeding ranges of the three recognized North American populations: the
Grey-winged trumpeter They are weak fliers, and will run by preference. The grey-winged trumpeter's song is a low humming, but its call, as its name suggests, is a very loud "JEEK" or honking "TZAAK". This bird is kept as a pet by Amerindians, since it is easily tamed, hunts snakes, and is a very efficient sentinel, with its unmissable alarm call. A captive grey-winged trumpeter named "Trumpy" was kept at Jersey Zoo by the author Gerald Durrell, and was noted for interacting with the people and animals of the zoo. "Trumpy" is mentioned several times in Durrell's book "Menagerie Manor". Grey-winged trumpeter