Wild white-throated laughingthrush, pterorhinus albogularis resting on tree branch, fluff up its feathers to keep warm, abnormal feathers loss in neck area, possible skin infection and viral diseases

white throated laughingthrush bird species pterorhinus albogularis feather fluff puff plumage unhealthy health condition poor disorder animal birdwatching ornithology park zoo scruffy symptom deficiency disease virus infection neck bacteria preen cage loss pluck moult stress sick problem viral destructive behaviour excessive abnormal skin damage mate patch bare perch branch rest issue wild