Nubian Woodpecker
Campethera nubica
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The Nubian woodpecker is a northeast African endemic. The enlargements include several color variations. The red and yellow colors come from food, carotenoids, and if the birds do not get enough or the color fades too fast, red turns yellow. Also, a minor mutation could lead to the carotenoid selection pathways selecting carotenoids with the wrong molecular weight as they are closely related chemically. For more comments on pigment, click Safari Ecology link. Click the photo above to see twenty enlargements which include beige-throated, dark-faced and yellow-headed variants.
 
Safari Ecology

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All unattributed images on this website are:
copyright © 2001-17 Ron Eggert or David Peterson
ll other images are the property of the indicated photographers:
Colin Beale, Shaun Wells, Steve Brynes, Paul Oliver, Stuart Webb
Mike Graham, Karine Van der Vurst

Last Update this page: 3-10-17