When will the parrot change hair

Parrots usually change their hair in the spring every year, but they only change it once in a few years.There are many types of birds, and different varieties of parrots are not the same, but basically they have some common points. For example, they will experience a hair change during the growth of the chicks.feather.After that, when you change your hair every year, when you change your hair, the old hair will fade first, and then the new one will grow.