Hi. I purchased a plum headed parakeet 5 years ago. Up until this point she has the coloring of the female. A few weeks ago she started changing and is now showing male coloring. Plum on the head is coming in. Black under the beak and the ring is turning plum. Everything I read states these changes occur 2-3 years of age. Does anyone have experience with these changes occurring at 5 1/2 years Thanks