Why does a budgerigar bite people?

Common reasons a budgerigar bites: 1) fear or feeling threatened, such as when its environment feels unsafe or its territory is invaded; 2) young budgies may bite out of curiosity; 3) self-defense. They may also bite to wear down the beak or from hunger.

To reduce biting, keep the budgerigar’s living environment quiet and stable, and avoid startling it.