One rainy morning a week ago, I hear a beautiful bird song that I cannot quite identify. It’s longish, sweet and melodic. From in the bedroom, I glance over at the feeders and there’s the usual ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. The finches that call Ecuador’s Galápagos Islands home are ...

The beaks of Darwin's medium ground finches can evolve to crush the shells of hard seeds. Credit: Andrew Hendry They say that hindsight is 20/20, and though the theory of ecological speciation—which ...

In the sunbaked Galápagos Islands, a male finch perches on a branch, hearing what sounds like another bird’s song. But something’s not quite right. The song is slower and deeper, like a familiar tune ...