A biting bird may be showing frustration or demonstrating a lack of socialization, or may be trying to communicate that he has been put in a situation in which he feels vulnerable. Understanding how to communicate with your bird and reduce his frustration can help to minimize situations in which he is biting. Biting behavior should never be considered acceptable, and proper training can eliminate this problem.
It is important to differentiate biting from other behaviors such as nipping lightly to get attention or accidentally biting while trying to get food. Birds don’t have hands, and even talking birds can’t verbalize specific emotions, so they use their beaks to do their talking for them. If they are upset or frightened, they may nip. If the nipping behavior escalates to painful biting, or draws blood, it is definitely important to train the bird not to bite.
Early training and socialization, usually between fledgling and around 18 months of age, is one important key in avoiding or minimizing bad behaviors like biting. At this age, you can help the bird get used to her surroundings, people, and other animals before bad behaviors become habitual. Once biting become the norm for a bird, it is much harder to retrain her not to bite.
Birds in the wild may need to bite in order to protect themselves when they feel threatened. Pet birds are no different, and can lash out when they feel vulnerable or in danger. A bird may be especially intimidated in new surroundings, 
and should be dealt with slowly and cautiously. A human reaching into the cage to take a bird out can cause a great deal of fear for him, resulting in a biting bird. Take time to allow the bird to become accustomed to you and to his surroundings. Deal with him slowly, patiently, and consistently. Birds who are in familiar settings and know what behaviors, actions and reactions to anticipate are less likely to bite.
A biting bird should always be dealt with quickly and firmly, to prevent the behavior from becoming a habit. As with most other areas of animal training, consistent behavior modification through positive reinforcement should be employed. Completely ignore your bird when she bites, or correct her with a loud and sharp “NO!” and lavish her with praise when she behaves well. She will soon associate the positive reinforcement with not performing the biting behavior, and your biting bird should begin to behave better.
