FW: ORNITH-L Digest - 23 Oct 1998 to 26 Oct 1998

To: "'Ozbird Mail'" <>
Subject: FW: ORNITH-L Digest - 23 Oct 1998 to 26 Oct 1998
From: "Conole, Lawrie" <>
Date: Wed, 28 Oct 1998 09:41:57 +1000
Given the recent discussion on Birding-Aus about albinism/schizochroism, I'm
forwarding this topical post from Ornith-L.

Cheers, Lawrie

> ------------------------------
> Date:    Mon, 26 Oct 1998 14:56:25 -0600
> From:    Jocelyn Hudon <>
> Subject: Re: Stresemann on schizochroism
> Mr. Hess,
> Stresemann was a keen student of avian coloration and published several
>  contributions on color aberrations (mutations) in birds.   He coined the
> word
>  schizochroism to refer to situations where only some of the pigments
> lacked or
>  were altered, for example when as a result of a loss of melanins,
> carotenoids
>  are the only pigments seen in the plumage.  In this respect the
> nomenclature of
>   color aberrations in birds differs somewhat from that in mammals, and is
> more
>  confusing than it should be.   It emphasizes what remains and not what is
>  missing, which I think is unfortunate as it diverts from what is causing
> the
>  color change in the first place.  As a result, an owl lacking melanins
> will be
>  called an albino (since they don't display carotenoids), whereas a
> woodpeckers
>  lacking melanins will be schizochroic.
> Jocelyn Hudon, Ph.D.
> Provincial Museum of Alberta
> ***************************************************

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