Parrots as Pets:
Parrots are not pets, they are companion animals. It has been said that parrots have the intelligence of three year old child, and the emotional maturity of a two year old. Believe me when I tell you this can be a lethal combination. Mira Tweti says in her book "Of Parrots and People" that unruly might as well be the dictionary definition of parrot. These statments are nothing less than the truth about parrots.
Parrots are not domesticated animals, they are wild animals; sometimes only a generation or so removed from living free in their wild native environment. Even a hand-fed, hand-reared parrot is still a wild animal being held in captivity.
A parrots natural instincts, inclinations and behaviors will be heavily present throughout its lifetime, and you will NEVER be able to completely train these behaviors out of them.
The AWC (Avian Rescue Coalition) has several wonderfull articles about what to expect from your parrot pet:
Behavioral Problems in Pet Parrots
Exotic Pet Birds Are Not Pets; Really
Parrots and People: A relationship of Conflict
The True Nature of Parrots
Treating Parrots as Birds; Not Mammals
Other Parrot Articles and Stories:
A Delightful, Awful Marriage to a Pet Parrot
Bye Bye Birdie