How does the tiger parrot look at age?

Judging the age of the tiger parrot can look at the eyes. The big eyes of 1-4 months are black. At 4-6 months, there is a layer of white eyes around the eyes. The eyes of more than 8 months are obvious.In addition, you can also look at its feet. The young feet are tender pink. When they grow up, they are mostly pink or gray -white, and even blue and black.In addition, there are horizontal lines above the wax film after the bird hours, which will fade away when they grow up.