"What does a sub-adult individual mean? How can you tell, streamer?"
"These feathers, so white, so beautiful."
"So raptors, just like humans, claim territory if they can and suffer in hunger if they can't?"
Lin Yang said, "A sub-adult is an individual that has already fledged from the nest, but has not yet reached sexual maturity. My judgment is based on its plumage, especially the feathers above the tail where it wraps around the waist."
Everyone can look here, the feathers in this area are slightly different from those beside it, probably because they haven't completely molted from the nestling down, which is the down they had while still in the nest."
Upon a close-up through the camera, indeed, right above the tail, at the wrapping waist position, the color of adjacent feathers has a clear difference, some being darker and duller, not as high-quality as the feathers in other parts.
