Parrocchetto alizolfo

Identificazione

The sulphur-winged parakeet is about 23 to 24 cm (9.1 to 9.4 in) long and weighs an average of 82 g (2.9 oz). The sexes are the same. Adults of the nominate subspecies are mostly green. Their head, nape, and throat have some yellow inclusions; bare white skin surrounds their eye and their ear coverts are bright terracotta. Their breast has a dull orange wash. Their wing is mostly green with yellow primary coverts, inner primaries, and outer secondaries; the outer primaries are blue. Their tail's upperside is rufous olive with green fringes on the feathers; its underside is reddish brown. Immature birds have duller scaling, less orange on their breast, and much less yellow on their wings. Subspecies P. h. gaudens has some orange-red markings on its head and its underparts are slightly darker than those of the nominate.

Tassonomia

The sulphur-winged parakeet has two subspecies, the nominate P. h. hoffmanni (Cabanis, 1861) and P. h. gaudens (Bangs, 1906).<p>It is named for the German naturalist Karl Hoffmann.[citation needed]

Nome scientifico

Pyrrhura hoffmanni

Autorità

(Cabanis, 1861)

Ordine

Psittaciformi

Famiglia

Psittacidae

Genere

Pyrrhura

Areale e habitat

The nominate subspecies of the sulphur-winged parakeet is found in the Cordillera de Talamanca and the Dota region of southern Costa Rica. P. h. gaudens is found in western Panama as far east as Veraguas Province. The species inhabits primary and logged montane forest and adjacent shrubby areas and secondary forest. In elevation it ranges from 700 to 3,000 m (2,300 to 9,800 ft) but usually occurs above 1,600 m (5,200 ft).

Migrazione

Resident species

Comportamento

The sulphur-winged parakeet moves from the upper elevations to the lower during the wet season, and sometimes makes daily elevational moves between roosting and feeding sites.<p>The sulphur-winged parakeet typically forages in small flocks in the forest canopy. Its diet is primarily the fruits and seeds of a variety of plants and trees.<p>The sulphur-winged parakeet is believed to nest mainly between January and June. It nests in a natural tree cavity or old woodpecker hole, typically between 8 and 20 m (25 and 65 ft) above the ground. In captivity the clutch size is six eggs, the incubation period 24 days, and fledging 10 weeks after hatch.<p>The sulphur-winged parakeet's most common call is "a series of high-pitched shrill notes, e.g. “krree krree krree” " that is given both from a perch and in flight. It is shrill but not screechy in contrast to that of other Pyrrhura parakeets. Perched birds are often silent. Flocks in flight "call frequently and simultaneously, producing a noisy, harsh and piercing chattering."

Conservazione

Tendenza della popolazione

stable