In some cases, such as young female juncos, distinguishing abnormally pale conditions from the extreme end of normal variation might not be easy.
David Spector Belchertown, Massachusetts
________________________________________ From: <massbird-approval...> [<massbird-approval...>] on behalf of Chris Heys [<chris.p.heys...>] Sent: Monday, December 30, 2019 2:42 PM To: Alvin T Laasanen Cc: Massbird Subject: Re: [MASSBIRD] Leucistic junco (?)
Very neat. Does anyone reading this have a quick and dirty rundown on the difference between albinism and leucism in our avifauna?
I understand albinism is loss of melanin while leucism is loss of other pigments aside from melanin and it did not affect the eyes. But is there a way to use the terms correctly simply by observing a particular bird?