Cockatiels only live about 20 years, Conures about 30, Senegals about 50, Cockatoos and African Grays about 60, Amazons 70, Eclectus well over 80 and Macaws 100 or more. They will bond with their owner as though they were the mate. They go quite crazy if that bond is broken for some reason. If you bond with one and then have to go away to college or into the military, they will hate you forever because a mate would never abandon them like that. We had a lot of crazy birds that had been through that. Some were very human aggressive because they had been scorned in such a way. You don't want to have a macaw angry with you. A large macaw like a scarlet has a bite strength around 700 lbs. per inch. Hyacinths' bites are much stronger. Perhaps 1000 or more. We had a Scarlet the stuck its beak through the cage of a Hyacinth and the Hyacinth bit the Scarlet's beak off. The Scarlet's mate had to feed it the rest of its life because it couldn't eat on its own. My friends that do rescue have some horrific scars. Check out this prison break bad boy. Can you break 1/4 inch stainless steel with your mouth?