They often fight over the seeds that they find on the ground. Sometimes they hurt each other. The black-headed caique s gestation period is approximately 27 days. They have a 2-4 egg clutch. Eggs are incubated solely by the female, while the male feeds her.
Babies are blind when they are born.
They are helpless and must stay in the nest for 62 days. When danger is near, the flock falls silent and then all at once takes off with a loud and confusing array of color and noise. When they do that the predator gets scared.