The buff-faced pygmy parrot (Micropsitta pusio ) is a very small green parrot found in subtropical or tropical moist lowland forest in New Britain and New Guinea.
Little-studied as an individual species, it is known mainly for being the world's smallest parrot, at 11.5 g (0.41 oz) and 8.6 cm (3.4 in). However, the average weight of six adults was surprisingly high at 14 g (0.49 oz), being slightly higher than two other pygmy parrots, the Geelvink and yellow-capped, both of which, nonetheless, have slightly longer total lengths. The male and female are similar in appearance; their plumage is mainly green with a yellowish tone on the underparts. The cheeks, face, and crown are buff (hence the common name). A dark blue patch is on the top of the head back to the occiput. Head markings are smaller in females, and facial colour is paler. The eyes are dark brown and the bill is grey, and legs are greyish with blue or pinkish tints. Immature birds lack the blue crown, replacing it with green, and the buff colour is less distinct.
Buff-faced pygmy parrots are found across the northern lowlands of the island of New Guinea from the west to the southeastern tip up to an altitude around 800 m, as well as in the Bismarck Archipelago. They inhabit subtropical or tropical moist lowland forest in small groups up to six birds and are highly active, hopping around on tree trunks.
