Caique ( or ) refers to a group of four species of parrots in the genus Pionites endemic to the Amazon Basin in South America. Name The term "caique" is primarily used in aviculture, with ornithologists typically referring to them as the "black-headed parrot and "white-bellied parrot" (which is sometimes further split into three separate species - green-thighed parrot, yellow-tailed parrot and black-legged parrot) to describe the nominal species. They have historically been called the “seven-colored parrot”. They are relatively small and stocky, with a short, square tail and bright colors; this may be why they are referred to as “caique” based on the term for a similarly described Turkish vessel. Description The two primary nominal species are best distinguished by the black-headed caique's black crown; both have white “bellies”. Their typical weight is 150–170 grams, with the white-bellied species being the larger and heavier of the two nominal species. They can live up to 40 years, but this is not common in captivity. Distribution and habitat The black-headed caique is found north of the Amazon River, and the white-bellied caique south; there is a large area of overlap between ranges. They can produce fertile hybrids, but this is not common in the wild as it is in captivity. They generally prefer forested areas and subsist on fruit and seeds. Caiques are generally canopy dwellers, spending most of their time in the tops of trees, foraging and playing. Taxonomy and systematics Originally Pionites were classified as two species, the black-headed parrot and white-bellied parrot. However, recent morphological work has indicated that the white-bellied parrot should be split into three species based on plumage and leg coloration. In the past these parrots were often allied with the conures or other South American parakeets. Recent mitochondrial and nuclear DNA work has found Pionites to be the sister taxon to the Deroptyus (the genus that contains the red-fan parrot); the two genera occupy a basal position in the tribe Arini. Natural history Behavior and ecology These parrots are found in the edges of forests and secondary-growth forests. They usually forage on at higher levels in the canopy, although can also be found lower at forest edges. At least two members of the flock act as sentries during feeding time. Their diet consists of flowers, fruit, pulp, and seeds, although in captivity they are known to eat insects. Depending on the species and the