Bug Casings In Webs On Ceiling

Look a bit like Mediterranean flour moth pupae. Are you seeing any small moths flying around your house? Could be the seed you are feeding to your parrot has an infestation of the larvae. When the larvae finish feeding they crawl away from the seed looking for a place to pupate. Try freezing all your bird seed for a few days and clean out the parrot cage to get rid of the pupae that are in the cage. Takes some time to get rid of all the moths as they will emerge from these pupae for some time. The adults lay their eggs in the bird seed. Often seed you buy from a bird store can be infested with the eggs and larvae of these moths

Dave