
Appearance
The yellow-shouldered amazon is mainly green and about 33 cm long. It has a whitish forehead and lores, and a yellow crown, ocular region and - often - ear coverts and chin. The bare eye-ring is white. The thighs and the bend of the wing are yellow, but both can be difficult to see. The throat, cheeks and belly often have a bluish tinge. As most members of the genus ''Amazona'', it has broad dark blue tips to the remiges and a red wing-speculum. Its beak is horn coloured.In its range the yellow shoulder patch and extensive yellow on the head distinguish the yellow-shouldered amazon from other ''Amazona'' species, which have red or orange on the shoulder and less yellow on the head . However, outside its range, several other ''Amazona'' species have as much - or more - yellow on their heads.

Status
Declines in several main land populations have been extensively documented, there are believed to be 2,500–10,000 yellow-shouldered amazons in the wild.Due to ongoing habitat lost, small population size, limited range and overhunting for the cagebird trade, the yellow-shouldered amazon is evaluated as Vulnerable on the IUCN Red List of Threatened Species. It is listed on Appendix I and II of CITES.
Reproduction
The yellow-shouldered amazon nests in a tree hole or cliff cavity and lays 3-4 eggs. Total clutch size and hatching success of this species on Margarita Island are among the highest documented for the genus Amazona, suggesting a high reproductive potential for the species It is highly gregarious when not breeding, forming flocks of up to 100 birds.Food
It feeds on fruits, seeds, and cactus flowers.References:
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