Vocal and plumage variation in the Bewick’s wren is extensive ... buzzier. Songs of birds in the interior subspecies-group (ero­moph­ilus group) are simpler than those from the far West ...

Did you know that some animals hire nannies? No, they don't pay other animals to raise their kids, but some animals--like an ...

Most long-tailed finches in Australia today have bright red bills, with the color coming from carotenoid (yellow) pigments in ...