New extralimital breeding records of saltmarsh sparrows () and Nelson's sparrows () and their implications.

Saltmarsh () and Nelson's () sparrows are sister taxa that breed in tidal marshes along the coast of the Northeastern United States and Canada. The Saltmarsh Sparrow breeds from mid-coast Maine south to Virginia, while the Acadian Nelson's Sparrow breeds from the Canadian maritime provinces south to northern Massachusetts. Here, we present three extralimital observations of breeding Saltmarsh ( = 2) and Nelson's ( = 1) sparrows.