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 ...

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 ...

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