Green-winged macaws: Like many other South American parrots, green-winged macaws gather at clay licks. They eat the clay to obtain sodium and minerals, and perhaps to neutralize toxins from many of the fruits and seeds in their diets.

Blue and gold macaws: Like most large macaws, these birds associate in pairs, often remaining with the same mate for life. Even when the macaws are flying in large groups, the pairs can be easily distinguished; they fly so close together their wing tips almost touch.