Amazon parrots mostly communicate vocally. Species such as orange-winged amazons have nine different recorded vocalizations used in different situations. However, patterns of gestural communication have been observed with the birds, thought to be used to avoid predators. In general, amazon parrots are very social birds in their foraging, roosting, and nesting. Most amazon parrots travel in large groups and have clumped nesting, but the four species in the Lesser Antilles are less social. Theories for why this is include the lack of predation risk. In captivity, amazon parrots are known for their ability to talk- learning to communicate by mimicking speech and other sounds of human origin. They also appear to have an affinity for human music and singing.