Unmistakable bird of mature lowland rainforest. Spherical black body with bold white wing patch perched on long legs, yellow bill. A fairly large bird, about the size of a chachalaca or small turkey. Highly social, and usually found in family groups of several individuals meandering through mature rainforest on the forest floor. Now rare in many areas due to hunting, but can be fairly common in more remote areas. Makes sharp “chack” calls and low booming notes. Sometimes follows army ant swarms or monkeys, and roosts in trees at night.