Each flock maintains a territory that could be as large as about . Movement The grey-winged trumpeter is entirely non-migratory and tends to move only within the flock's territories. It does not cross major rivers. Feeding Adult grey-winged trumpeters feed mostly on soft fruit that has fallen to the forest floor. Though much of it has been knocked loose or picked and dropped by squirrel monkeys or arboreal birds, it tends to persist so the trumpeters do not need follow monkey troops. Fruits eaten are usually those of large trees but trumpeters will pick fruit from shrubs as well. About 10% of their diet is small arthropods, some of which they capture when following army ant swarms. Chicks are fed a greater percentage of arthropods when young. Adults also eat small vertebrates but only rarely. Breeding Grey-winged trumpeters are polyandrous and cooperative breeders. Up to three males mate with the dominant female of the flock, and all members contribute to raising the young. The species usually nests in holes in trees that have been excavated by other species, and sometimes also in natural breaks where for instance a trunk has split. They do not build a nest in the hole. They apparently time their breeding so the eggs hatch at the beginning of the local rainy season when fruit, and especially insects, are abundant. The clutch size is two to four eggs but usually three. Vocalization All trumpeters are highly vocal. The grey-winged trumpeter's song is a low humming "wuh-wuh-wuh wuh wuh - -". Its alarm call is "loud, harsh 'GRAH' notes". In captivity Indigenous peoples tame trumpeters as sentinals because of their predator-spotting ability and loud alarm call; they are also thought to kill snakes. 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". Status The IUCN follows HBW taxonomy and so assesses the grey-winged and ochre-winged trumpters separately. Both are rated as being of Least Concern. The population size of neither is known but both are believed to be decreasing. The white-winged trumpeter sensu lato is heavily hunted. It is frequently trapped by indigenous peoples but does not reproduce in that captivity. Deforestation for timber, ranching, and gold mining is an ongoing threat. Gallery References External links Stamps