Most parrots are social birds that live in groups called flocks. African grey parrots live in flocks with as many as 20 to 30 birds. Many species are monogamous and spend their lives with only one mate. The mates work together to raise their young. Parrots throughout the flock communicate with one another by squawking and moving their tail feathers. Some parrots, like the kakapo, are nocturnal. They sleep during the day and search for food at night. Source: Livescience