White-bellied parrot

The white-bellied parrot (Pionites leucogaster), or white-bellied caique in aviculture, is a species of bird in the subfamily Arinae of the family Psittacidae, the African and New World parrots. It is found in Bolivia, Brazil, Colombia, and Peru.

The white-bellied parrot is 23 to 25 cm (9.1 to 9.8 in) long and weighs about 155 g (5.5 oz). It is a chunky, short-tailed parrot. The sexes are the same. Adults of the nominate subspecies P. l. leucogaster have mostly yellow heads with orange crowns and napes. Their upperparts are mostly dull green with a bright green rump. Their throat, the sides of their neck, their breast, and their vent are yellow. Also, their lower breast and belly are white with bright green thigh feathers. Their wing is mostly dull green with reddish-orange axillaries and dark blue primaries. Their tail is bright green. Furthermore, their bill is pale horn colored with a bright pinkish cere, their iris reddish brown, and their legs and feet bright pink. Immature birds are similar to adults but with a brownish crown and nape.

Subspecies P. l. xanthomerius has an apricot-orange crown and nape, yellow thigh feathers, and blackish legs and feet. P. l. xanthurus also has an apricot-orange crown and nape and yellow thigh feathers. Its tail is yellow. It has the same pinkish legs and feet as the nominate. Both of these subspecies intergrade with each other and with the nominate.

The white breast feathers of the white-bellied parrot are often stained a chestnut brown (or "isobel") color. This may be due to tannin staining, as result of their particular affinity for bathing by rubbing their bodies against wet leaves and other plant matter. The head and nape plumage of the white-bellied parrot has been observed to fluoresce strongly under ultraviolet light.