Scoter populations in South Puget Sound have declined by 69% since 1995. Other seabirds -- like this Barrow's Goldeneye -- have not fared well, either. Suspects include heavy metal contamination, a drop in herring populations, derelict fishing gear, and the destruction of shoreline habitat…

The territories of Townsend's Warblers and Hermit Warblers overlap in Washington State. Ornithologists call the overlap where the two species interbreed a "hybrid zone." The hybrids - like the one seen here - reveal characteristics of both. And they may also lend clues about our changing…