A Smooth-billed Ani glides into a viney thicket and disappears from view. It carries a clump of grass in its big bill, and tucks it into a bulky nest. Then another ani appears, providing a contribution of twigs. More follow. All told, twelve anis build a single nest.
Later, the group's four reproductive females each lay four or five pale blue eggs in the nest. Most members share in incubating and protecting them during their two-week period of development.
This cooperative association allows more young anis to fledge, but it seems the individual's interests override those of the group--during the next few days, each female will toss one or two eggs (other than her own) from the nest!