The yellow-shouldered parrot is a highly social species, usually found in pairs or small flocks, although groups of up to 100 birds are occasionally seen at communal roosts or fruiting trees (6) (7). The yellow-shouldered parrot is largely frugivorous, and will eat the seeds and fruits of trees, palms and cacti. It will also take the fruit of mango, papaya and avocado trees in plantations, a behaviour that has labelled the species as a crop pest (6). Like most other small parrots, this species flies with a swift, direct flight and may be extremely vocal, calling with an array of raucous chatters, squeaks and shrieks (8).
Most parrots are monogamous so it is likely that the yellow-shouldered parrot will mate with its partner for life. Pairs remain together constantly and reinforce the pair bond by feeding and preening together (8). Breeding takes place between March and August, with pre-existing cavities in tall trees or ledges on cliffs being used (6). The eggs are incubated for around 26 days and the young chicks will fledge nine weeks after hatching (2).