There are more than 330 different species distributed from equatorial to near antarctical regions of the world. With little exceptions they nest in hollows of old trees, termite buildings or hollows of steep river banks and mountain slopes. The hatched birds are very weak and take a long time to develop until fledging. This is typical for birds which nest in hollows. Depending on the environment there is a more or less clear defined breeding season.
Eggs are normally of white color.
Outside the breeding season parrots in general are very social birds which gather in flocks from small parties to thousands in number. This instinctive socialization soon made them pets in human history. Kept in captivity parrots are forced to take man as flock-social partner by instinct if there is no natural partner availibale. Pair bonding is very strong. Young parrots may choose their lifetime partners before maturity.