X is for Xanthochroism: something different for Thursday Challenge

Its not often that you see a male Evening Grosbeak which doesn't have any black on it, but I did; on two different occasions! This is an example of the condition called xantho- chroism, which occurs when yellow replaces the normal colouration of the feathers. In this case the yellow coloured male Evening Grosbeak shown here is lacking the black feathers that a male usually displays. You can see the com- parision of the normal and abnormal colouration in the first photo, and also in the one below as two Evening Grosbeaks perch, one on each end of the feeder.

To learn more about the weekly meme Thursday Challenge click on the yellow coloured grosbeak at the top right hand of the page. Each week the theme challenge changes. today's theme is 'something different. seeing this yellow coloured Evening Grosbeak indeed was something. Thaank you to 'spun with tears' for hosting this challenge.