In some finch species, the difference between colorful males and muted females comes down to one gene, BCO2, which encodes an enzyme that degrades carotenoids. Explore how the design and application ...

What Does a House Finch Look Like? The male has reddish forehead, breast and rump; a female house finch is streaked gray and brown above, with a lighter underside. Both sexes have brown-streaked ...

The attractive house finch is one of the more common and recognizable species throughout the United States. Originally a “western” species of semiarid environments, it was introduced in the ...