In the pine forests of Idaho, a bird called the South Hills crossbill is waging one seriously bizarre evolutionary war. Over the last 5,000 years or so, the crossbill---so named because the two halves ...

When evolutionary biologists decide that one sub-population of birds has been isolated from all others, does not interbreed, and has evolved enough genetic differences to suggest many thousands of ...

Most songbirds head south for the winter, as food supplies disappear, returning to breed in the spring, when booming insect populations can satisfy clamoring broods. Not crossbills. This colorful ...

At 6:30 one morning in early July, Craig Benkman, a University of Wyoming ecologist, began to stalk red crossbills in the South Hills of Idaho. We were between Twin Falls and the Nevada border, ...

The recently discovered Cassia crossbill is range-restricted, occurring in just two small mountain ranges on the northeast edge of the Great Basin Desert. Based on a new study, Cassia crossbills ...

My friend Debbie who lives on Boreas Pass Road photographed a pair of crossbills at her bird feeder. These birds, with their unusual beaks, are uniquely evolved to feed on the seeds of conifers.

While out on a springtime snow trail, I recently saw a dozen white-winged crossbills pecking at snow on the side of the trail. When I reached the spot, I saw a yellow stain from where a team of dogs ...

Rachel White’s poem reflects on nature, friendship and the quiet beauty of the wild.

These photos have just arrived in our Flickr group and feature a resident but rarely seen species in Wales - crossbill. Crossbill are a chunky member of the finch family and as the name suggests, have ...

Although many woodland birds flock to their garden feeders, Robert and Patricia Urquhart were puzzled by an unfamiliar red finch with an apparently deformed bill. A two-barred crossbill - four have ...