losing feathers

Hi guys I have an alexandrine parakeet about a year and a half old. He started losing his feathers in march 2015 and they stopped losing in august but they were growing back very slowly and not long before they were fully grown he again started losing them at a very fast pace he has lost his...

This is Cleo and her tail suddenly looks like this. I notice she has been losing lots of feathers lately and a few tail feathers, so I assume she is molting. But I've never seen so much tail feather loss in one time. She has little nubby feathers coming in but I just want to see if this is...