While yellow-billed finches don't produce red carotenoids in their bills, they can still make them in their retinas. "It's not that yellow-billed birds lack the genes for making red coloring; rather, ...

Carotenoids are the underlying pigment for much of the enormous variety of color found across birds and form the basis for the colors red, yellow and orange. In a study published in Current Biology, ...

Yellow House Finch: Normal or Not? House finches are common birds that brighten up backyard feeders across the United States. Bird-watchers throughout the country admire their rosy plumage and cheery ...

If you hang a bird feeder outside your home, there’s a good chance that your first visitor will be some kind of finch. We have five kinds of finches in Marin: the reddish house finch and purple finch, ...

If you have a bird feeder in the continental United States, you have almost certainly been visited by house finches. On both sides of the Mississippi their hungry flocks coat feeders like displays of ...

Add Yahoo as a preferred source to see more of our stories on Google. With so many beautiful birds regularly visiting gardens across the UK, it can be hard to tell them apart. But one year-round ...

Probably, the American goldfinch should have been included in last week's column. It's another good starter bird, like the yellow warbler. It shouldn't be confused with the yellow warbler, though. The ...

Carotenoids are the underlying pigment for much of the enormous variety in color found across birds and form the basis for the colors red, yellow, and orange. In a study published in Current Biology, ...