Do not handle your bird. Transport your bird immediately to a veterinarian. A bird's bones are brittle and easily broken or crushed. The most common fractures occur in the legs and wings, usually from falls, animal attacks, flying accidents, etc. Poor nutrition can contribute to fractures, by making the bones even more fragile.
Broken bones can cause infections in birds, so proper treatment is essential.
Symptoms of a broken bone can include behavioral changes such as your bird favoring or failing to use a broken leg or wing. Your pet can have difficulty in perching, the wing or leg can be droopy, dangly, or floppy. You may notice swelling, bruising, or tenderness. If you suspect a fracture, handle the bird as little as possible. Gently return it to its cage and transport it to your veterinarian.