In most parrots, if there is a line or strip between the head and the skin cap, the parrot is less than 3-4 months old. If there is no bar in this location, it means that the parrot has changed its feathers at least once. More than 3-4 months. Some parrot birds can not apply this test to determine their age, namely lutino birds, and the parrot (Albino) which has no feather marks due to a genetic mutation.