The blue-winged parrotlet is a species of parrot in the family Psittacidae. It is the nominate species. There are two subspecies: Salvadori's blue-winged parrotlet and Hellmayr's blue-winged parrotlet.
Description
Distribution and habitat
Blue-winged parrotlets are found in much of central and northern South America. Their range is split by each subspecies, as described above. It is generally common and widespread, though more localized in the Amazon Basin. Blue-winged parrotlets are mainly found in lowlands. They occur in dry and riparian woodlands, cerrado, caatinga, palm groves, semi-aridscrubland, savanna, and pastures. Blue-winged parrotlets tend to avoid densely forested areas. They are not found at altitudes above. Blue-winged parrotlets are generally non-migratory; however, populations in Argentina move locally according to the flowering seasons of various plant species in their diet. Populations in the Brazilian Atlantic Forest are altitudinal migrants.
Conservation
The number of blue-winged parrotlets is unknown, but the population is stable. It is listed as Least Concern by the IUCN Red List. The number of wild individuals is unknown.
Threats
The blue-winged parrotlet is not known to be affected by deforestation or the pet trade, unlike many of its close relatives in the genus Forpus. There are many areas across its range that are already protected.
Flocks are usually around 20 birds but can grow to over 50 around fruiting trees or seeding grasses. They are highly social and gregarious. Blue-winged parrotlets tend to feed in groups, usually between 2 and 12 individuals. Blue-winged parrotlets call while in flight and perched. Their calls are high-pitched "sheet" or "zeet" screeches or twittering. When feeding and socializing in large groups they make twittering and chattering noises.
Reproduction
Blue-winged parrotlets' breeding season is May to August, but occupied nests have been observed in July, January, and March in different areas of the birds' range. Females lay 3-7 small, white, roughly spherical eggs. Some blue-winged parrotlets have been observed to scrape rufous hornero nests with their beaks. Though the reason for this is not entirely clear, nests created by rufous horneros have been used by blue-winged parrotlets to raise their broods, which has led to the suggestion that the parrotlets are "taste-testing" the nestmaterial to determine whether it is suitable, according to unknown standards, for their needs. However, similar studies of other Forpus species have concluded that clay-licking provides important minerals to the birds that otherwise would not be accessible.
Diet
Blue-winged parrotlets mostly feed on Cecropia sp. and Ficus sp. fruits, Mikania sp. and Trema micrantha seeds, and Ambrosia sp., Handroanthus serratifolius, and Marcgravia sp. flowers. However, they are known to occasionally feed on other plants such as grass. Blue-winged parrotlets have been known to migrate locally based on the flowering and fruiting seasons of some of the main plants of their diet.
Taxonomy
For many years, the blue-winged parrotlet was considered conspecific with the green-rumped parrotlet, but today all authorities recognize the two as separate species. The turquoise-winged parrotlet and the large-billed parrotlet were also considered conspecific with the blue-winged parrotlet until studies in 2015 pointed out the error in this classification based on morphological and geographical differences. However, some taxonomic authorities, including the American Ornithological Society, still consider them so. The blue-winged parrotlet is a rare case in which the common name has been more stable than the binomial. F. xanthopterygius initially referred to what are now considered two distinct species: the blue-winged parrotlet and the white-winged parakeet. In 1945, the Brazilian ornithologistOlivério Pinto discarded the name F. xanthopterygius for the blue-winged parrotlet and renamed it F. crassirostris. During the same year, the blue-winged parrotlet was mistakenly recorded as F. xanthopterygius crassirostris and was again reverted to F. xanthopterygius. In 1978, Pinto mentioned the mistake in Novo Catálogo das Aves do Brazil and the name was changed to F. crassirostris. However, as was pointed out in 1999, the original name remains valid per ICZN rules. Consequently, this name was re-applied to the blue-winged parrotlet. Additionally, the name of the nominate subspecies also changed: F. x. xanthopterygius is the subspecies formerly listed as F. crassirostris vividus''.
