There are 3 subspecies of the Blue-headed Pionus/Blue-headed Parrot:
Pionus menstruus menstruus - nominate subspecies
Pionus menstruus reichenowi - head and neck darker blue and more blue coloration throughout body
Pionus menstruus rubrigularis - blue of head and neck duller than nominate, conspicuous red base to throat feathers
Primarily a forest canopy dweller, the Blue-headed Pionus will also frequent and cause severe damage to corn crops in its native habitat, and is also fond of bananas, attacking the bunch with great zeal. Of the three sub-species, the nominate Pionus menstruus menstruus is found throughout the wide distribution range, while Pionus menstruus reichenowi is limited to Brazil, and Pionus menstruus rubrigularis is found only in Central America.
The Blue-headed Pionus is one of five Pionus genus of parrots. Also included is the Maximilian (Pionus maximiliani), Dusky (Pionus fuscus), Bronze-winged (Pionus chalcopterus), and White-capped or White-crowned (Pionus senilis). The Pionus is considered to be one of the more under-appreciated parrots, probably because it is not a prolific talker and does not display the majestic colors of some other parrot varieties, although, a healthy Pionus will have an almost iridescent quality to its feathers. With a gentle nature, when well nourished and handled with love and compassion, the Pionus will become a devoted pet.
Not much for talking, the Pionus makes up for this parrot character flaw in its friendly disposition and aerobic antics. The Pionus is considered an excellent bird for beginning parrot owners and can be purchased for between $400 and $1,000, depending on region and purchasing source.