All Images
Research News
Colorful bird feathers offer evolutionary clues
The common redpoll has 17 carotenoid compounds in its plumage.
Credit: Alex Badyaev
Download the high-resolution JPG version of the image. (50.7 KB)
Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.