markers for the formation of separate species. Next, the team plans to sample more birds and study whether being a hybrid affects reproductive success. "It's very cool that we could capture a real ...

This healthy, 1-year-old male offspring of a rose-breasted grosbeak and scarlet tanager is the first-ever documented hybrid of its kind. The two species have such divergent nesting preferences ...

These orange-billed hybrids occur naturally in a narrow region ... and may help explain similar color variations seen in ...