Why Yellow Birds Mysteriously Turn Red. No one could figure out why a North American woodpecker's feathers were changing color—until now. By Carrie Arnold. October 21, 2016 ...

Two teams of researchers have independently identified a gene-encoded enzyme that converts yellow pigments obtained from the diet into red pigments, which birds use to color their feathers, bills ...

This rare yellow cardinal has been frequenting backyard bird feeders in Rushville, Illinois, since February 2020. Of the 12 million (mostly fiery or red-tinged) cardinals in North America, there ...

Now, a bird with the same genetic mutation -- one that makes the bird’s feathers appear bright yellow instead of red-- has been spotted in the Birmingham suburbs, about 15 miles away from the ...

"To produce red feathers, birds convert yellow dietary pigments known as carotenoids into red pigments and then deposit them in the feathers," says Miguel Carneiro of Universidade do Porto in ...

While there are an estimated 15 million red cardinals across the eastern U.S., making it one of the most common birds in the wild, there are just 10 to 15 yellow cardinals flying around the region.

T he most distinguishing characteristic of a male yellow-headed blackbird is its bright yellow head and chest, hence its name. “It’s also bigger than a red-winged blackbird,” says Paige ...

Many red-colored birds have to convert yellow pigments in their food into the red pigments that make their feathers and beaks so brilliant. By Karen Hopkin. IMAGE 100 (MARS) ...

Seeing red to being red: conserved genetic mechanism for red cone oil droplets and co-option for red coloration in birds and turtles, Proceedings of the Royal Society B: Biological Sciences ...