2. Look at the thick wrinkled skin on the eyelids. It should be an old bird.
The body of young birds is not as thin as the feathers of adult birds.
4. The toenails of adult birds are much longer, the color of the mouth is even, the sharpness is high, and the mouth of parrots is also long.
... (If you like my answer, please choose the best answer for my answer, thank you) ...