A female house finch forages near the Hay Barn at UC Santa Cruz. House finches are common from coast to coast today and are familiar visitors to backyard feeders. These birds are native to the ...

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 bellies. These birds measure 5 3/4 ...

The paper M. Gazda et al., “A genetic mechanism for sexual dichromatism in birds,” Science, 368:1270–74, 2020. Male red siskins (Spinus cucullatus), a species of finch, flaunt orange-red bellies and ...

Identifying the male and female house from other Carpodacus finches requires care. The male house differs from the male purple finch not only by having a smaller, more curved bill, but also by ...

Lesser coverts duller. Juvenile: resembles adult female. Unstreaked. The male is unlike any other finch in North America; the Wilson’s warbler is the only other bright yellow species with a ...