The most important thing to do for any trauma is to make sure your bird is calm. Delay first aid attempts until the bird is no longer stressed. Place your bird in a warm quiet environment for several minutes. After a period of rest, first aid efforts can begin. In the case of severe bleeding, you may have to render aid before calming the bird. After first aid efforts have been completed, always contact your veterinarian. Most bird injuries will need additional veterinary care.
For more information, please read First Aid For Birds