[A male house finch perches on a branch in a tree. He has bright red feathers on his head and chest. He looks around, turns around, and takes off.] [Explore MacaulayLibrary.org]End of transcript
In many bird species, including the House Finch, females are attracted to males with more vibrant feathers, a trait that can indicate a male’s superior physiological condition. This has been tested through an experiment that found that male House Finches with bright red plumage recovered faster from illness than those with dull, yellow feathers.