I think it might be a male/female chimaera.

On Fri, Mar 4, 2016 at 8:55 PM, Kevin Lucas <vikingcove at gmail.com> wrote:

> Williamson's Sapsucker half-normal plumage
>
> My reward for a nice long hike in the snow today was a Williamson's
> Sapsucker (WISA) that had yellow only on the left side of its breast. On
> its center and right breast were black and white markings -- not the black
> with white wisps I usually see on adult males' breast sides. Its
> vocalizations and drumming were typical for WISA, and it was calling and
> drumming with two or maybe three other WISA. In March of previous years
> I've photographed WISA with unusual black markings in what is usually a
> solid white wing patch, but this seems like something different is
> happening -- where plumage on just one side is wacky.
>
> Can anyone provide me with information on what causes this one side color
> abnormality, and whether there's a term for it? So far my Google searches
> have landed on albinism and leucism. Maybe it has something to do with
> hybridization.
>
> I posted a still image frame capture from a movie, along with a movie in
> which you can hear the characteristic WISA drumming. I apologize for the
> image shake (superzoom hand held in the cold).
> Here are links to the still photo
> https://www.flickr.com/photos/58148027 at N07/25397070352/in/dateposted/
> and to the movie clip
> https://www.flickr.com/photos/58148027 at N07/25148050649/in/photostream/
> on my Flickr photostream.
>
> Thanks,
> Kevin Lucas
> Selah, WA
>
> <a href="https://www.aba.org/about/ethics.html" rel="nofollow">Birding
> Ethics</a>
>
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>


--
Loren Mooney
https://www.flickr.com/photos/loren-mooney/ <http://www.mooneyimages.com>
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