The Grey-winged Trumpeter is a forest bird of South America that appears larger when it arches its wings.
When it arches its wings high, its body appears larger than it is.
It eats fruit and seeds as well as insects, centipedes, and spiders. During courtship, groups perform dance-like movements.
It spends much of the day foraging on the forest floor. It can fly but usually walks, then roosts in trees at night.
It lives in small groups in which one female lays the eggs. She mates with several males, and group members help raise the young together.
It has a long neck and legs and a short, pointed bill that curves slightly downward. Much of the body is black; juveniles have dark gray plumage with cinnamon and rufous streaks and bars.
An extinction-risk assessment has not been added yet.