How does Alexander think of age?

There are many ways to look at Alexander's big parrot, such as the brightness of feathers, the color of the bird's beak and the paw, and the rough skin.Usually the feathers are bright and delicate with young birds. The color of the bird's beak and paws is relatively bright, and the skin is very tender.If it is an old bird, the feathers are often messy, the beak and paws show signs of whiteness, and the skin is a bit rough.