About Psilopsiagon aurifrons (Lesson, 1830)
This species is a small parrot with a scientific name of Psilopsiagon aurifrons (Lesson, 1830), commonly called the mountain parakeet. It reaches about 18 cm (7 in) in length and weighs around 45 g (1.6 oz). For the nominate subspecies, P. a. aurifrons: the male has green colouring on its head, mantle, back, and tail. Its green primary feathers have blue outer webs, with yellow colouring on the face, throat, and breast that fades gradually to yellowish-green on the belly. The eye is brown, and the bill is horn-coloured. Females of this subspecies are similar to males but have a yellow forehead. Juveniles resemble females but have shorter tails. Both sexes of the subspecies P. a. margaritae are similar to female P. a. aurifrons, but they are larger, have shorter tails, and females of this subspecies have grey bills. The subspecies P. a. rubrirostris matches P. a. margaritae in base colour, but its head, breast, and belly are a darker shade of green with a blue tinge. In this subspecies, the male's bill is pinkish-buff and the female's bill is grey. Males and females of P. a. robertsi resemble P. a. aurifrons, but they have a darker green belly and brighter yellow colouring on the chin and throat. The mountain parakeet is found in the Andes at altitudes between 1,000 and 4,500 metres (3,300 and 14,800 ft), with a range covering Peru, Chile, Bolivia, and Argentina. Its typical habitat includes vegetation near rivers, bushy slopes, scrub areas, rough grassland with cacti and brush, and agricultural land. It also lives in man-made environments such as parks and gardens. The four subspecies each occupy separate, non-overlapping parts of the species' total range. This species is non-migratory, but individual birds move to higher altitudes in summer and lower altitudes in winter.
