Pionus
From Wikipedia, the free encyclopedia

Pionus is a genus of medium-sized parrots native to Central and South America. Characteristic of the genus are the chunky body, bare eye ring, (which can vary in color), and short tail. They are similar to Amazon parrots, only smaller. Coloration is generally subdued yet complex; under bright lighting, their feathers shimmer with iridescent brilliance. Many species share a bright red patch of feathers under the tail; the scientific name of one species, the blue-headed pionus, (P. menstruus), refers to this. Males and females are similar, with no notable sexual dimorphism.

Pets
Pionus parrots are regarded as excellent pets, although some species are very rare in captivity. Most commonly kept species are the Blue-headed, Maximillian (Scaly-headed) and White-Capped. Others, such as the Dusky and the Bronze-winged have become more common due to captive breeding.
Pionus parrots are known for their quiet (compared to other parrots) and reserved natures. Unlike some other companion parrots, aviculturists have noted that they are not particularly playful, and do not enjoy being wrestled with or flipped on their backs, but they do provide noninvasive companionship and are described as gentle and charming pets.

When excited or frightened, birds of this genus emit a characteristic wheezing or snorting sound that is sometimes mistaken for a sign of distress, or a symptom of disease. They also give off a musky or sweet odor that some caretakers find unpleasant, but others enjoy.

Pionus parrots are susceptible to obesity, vitamin A deficiency, and aspergillosis in captivity. These conditions, with the exception of aspergillosis, are easily prevented.

Species list
Blue-headed Pionus, Pionus menstruus
Red-billed Pionus, Pionus sordidus
Scaly-headed Pionus, Pionus maximiliani
White-crowned Pionus (or White-capped Parrot), Pionus senilis
White-headed Pionus, Pionus seniloides
Plum-crowned Pionus, Pionus tumultuosus
Bronze-winged Pionus, Pionus chalcopterus
Dusky Pionus, Pionus fuscus

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Shown below: White Capped Pionus, photo courtesy Dani and Jezebel