You must be kidding. This bird is commonly referred to as "the gentle giant." I've never seen or heard of it biting people for annoying it. Likely either you, its breeder, or someone that had it before you did not treat it right and it was very scared rather than very annoyed. They certainly have their drawbacks, most notably a very high noise level, but a violent temperment is not one of them. The only true part of this article really is that they have a powerful beak. They have the second most powerful beak of any bird, second only to Hyacinth Macaw. They can achieve 2000 psi (pounds of pressure per square inch) and are capable of more very impressive feats with their beak, such as snapping a wooden broomstick in half. Some have even been said to be able to crack a coconut shell. While that may sound intimidating, keep in mind the damage that a good sized dog is capable of. Most animals, including many we keep as pets, are capable of great damage but they don't use it unless they feel they have to. Very few animals are fond of wanton violence and greenwing macaws are certainly no exception. Again, these birds are extremely good natured usually. While it's true they haven't been domesticated as long as some animals, they've taken to being pets very well. If anything, they have the opposite problem as the one you say. They don't have a problem with getting annoyed with people, they have a problem with wanting more attention from their owners than they can spare. A great deal of the noise they make that people complain about is actually them trying to call their owners as they do their mates in the wild. They love attention and games. They are extremely intelligent. This cannot be overstated. These birds are considered to be of about the same intelligence as a small child. Animal Planet's Most Extreme proclaimed parrots as the smartest animals on the planet, and greenwing macaws and almost universally thought of as the smartest parrot. Even if they overstated parrots position on the mental totem pole, they're still far smarter than traditional pets such as dogs and cats. Anyway, these birds certainly aren't for everyone. They're noisy, they're needy, and they're expensive. But they're also incredibly intelligent, positively gorgeous, and very loving. If you can afford one, can spend enough time with it, can handle its noise level, and are willing to make a lifelong commitment (their lifespan is almost as long as a human's, so if you get a baby as an adult, there's a good chance you'll beat it to the grave) then it makes a magnificent pet. Oh and lastly it's not very common anymore for wild caught birds to be sold for pets anymore. They're sadly endangered due to deforestation and even though they're a hard animal to breed, it's a lot easier to breed them than it is to catch an endangered bird in the wild.