Xanthochroism is where normal red pigments replaced by yellow. This is also the cause of "yellow cardinals"
At the Sax-Zim Bog Welcome Center last winter we had one of these xanthochroistic redpolls ...or should I say "Yellowpoll" Sent from my iPhone On Apr 9, 2015, at 11:40 AM, "Earl Orf" <earl...@uslink.net> wrote: > When I closely examined some Redpoll photos that I took this spring, I found > some with orange or yellow feathers on the top of the head. I don't > remember seeing this before. I did some internet searching and found some > photos and references to orange feathers but no explanation for it. Does > anyone know what causes this? > > Here's a link to some photos. Scroll down on that page to see some > close-ups. > > http://www.earlorfphotos.com/Pictures-of-the-Week/2015-Pictures-of-the-Week/ > April-5-2015-Redpolls/ > > Earl Orf > <http://www.earlorfphotos.com/> www.earlorfphotos.com > > http://www.etsy.com/shop/EarlOrfPhotos > > > > ---- > Join or Leave mou-net: http://lists.umn.edu/cgi-bin/wa?SUBED1=mou-net > Archives: http://lists.umn.edu/archives/mou-net.html ---- Join or Leave mou-net: http://lists.umn.edu/cgi-bin/wa?SUBED1=mou-net Archives: http://lists.umn.edu/archives/mou-net.html
