Told from male Cassin’s finch by brown cap and eyebrow and curved bill. Other tell-tale differences between the species include the Cassin’s pink cheek and pinkish tone on its back ...

Male house finches also have red plumage but it is mainly confined to their breast, forehead, and throat. Throughout the rest ...

There are now at least 13 species of finches on the Galapagos Islands, each filling a different niche on different islands. All of them evolved from one ancestral species, which colonized the ...