Another thing that helps birds that bite:
Everytime they bite you, put them down and walk away. In future, they will associate biting you with being put down and left alone. I have heard that this method is really effective.
i got this article from
http://www.featheredfamily.com/biting.htm
If you have an otherwise sweet individual who suddenly took a hunk out of your finger, there are things to consider. Was the bird overtired? How about overstimulated? Were there strangers in the environment? Were you stressed out at the time of the bite? Any of those things can cause your companion parrot to lash out in what seems like an unpredictable attack, but actually is the only defense available to a parrot who perceives himself in a dangerous situation. This situation requires that you examine your bird to be sure it is not hurt or sick, and do what is needed to fix it's environment so that it feels safe once again.
What about those birds who are aptly named things like "Vampire" or "Kujo"? This is another story. There are a lot of things you can do with a bird who is an attack parrot. The first and foremost thing to do is protect yourself during all interactions. Your no good to the bird when your hopping up and down, cursing, and bleeding all over. Use a hand held perch for step ups with this bird, never allowing him the chance to remove your little finger at the knuckle. Look at life from his perspective, are you daring to wander in his domain? Did you have the audacity to touch another parrot within his jealous sight? I seriously recommend behavior consultation with birds of this level, as usually it is something within the home causing this problem and the people affected are just too involved to see the answer.
On to the baby bird who thinks of your fingers as a biting pacifier. First, let me state most baby parrots will "Beak" fingers. That means they will place their beak on your fingers and squeeze a bit. This should not be painful, and if it is you need to correct this behavior. Do not allow your sweet baby to grow up thinking that your face or hands are good chew toys, this will destroy the relationship. Consider why the baby is biting you. Is he hungry? Tired? Overstimulated? Territorial? Dealing with these issues from the birds perspective can have an amazing effect.
The most important thing I have to say about biting birds is - Never Strike A Biting Bird. You should never hit any bird, but when they bite it is instinct to swing your hands around. Avoid this at all costs. The best thing you can do, and I know this is counterintuitive, is to press the part being bitten INTO the beak while firmly saying "NO" (not yelling) and gently opening the beak to remove the bitten part. It's hard work, but its worth it in the end to turn your birds biting behaviors around.