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Thanks Charlotte - all too often it’s easy to forget that at times 😉

So checking in case this is a cultural misunderstanding (giving my critics the benefit of the doubt 😉), this is how the National Aubudon Society describe ‘juvenile’ “What is “juvenile” plumage? The juvenile stage refers to the period right after a fledgling leaves the nest. For some species it...

Well I know Americans have different ways of labelling plumages but to say a 2cy Bald Eagle in juvenile plumage cannot be regarded as a ‘juvenile’ makes absolutely no sense from an ornithological perspective - at least in how we approach moult definitions etc outside of America. A bird is...

This is the only point I was making really - the bird in the OP is still in the plumage attained when replacing the down feathers, so calling it a ‘juvenile’, even though it is in it’s second calendar year, is not just commonly but technically correct. If we want to describe birds by their...

I disagree with you, sorry. ‘Juvenile’ refers to the plumage (juvenal) - ‘2cy’ refers to the calendar year - the two are not mutually exclusive at this stage of development. Once it moults out of juvenile plumage later in the 2cy, it can be said to be in basic 1 plumage or young immature or...

Nice image of a juvenile (2cy) Bald Eagle 🙂 note a similar age GE still has an fairly darkish bill, more clearly defined white banded tail and light feathering on the nape https://macaulaylibrary.org/asset/223120291 https://macaulaylibrary.org/asset/219069841