I'm not sure what he's doing so far from Nashville, but he brings a splash of color to Yosemite. In fact, the Nashville Warbler was first observed in Nashville, but doesn't breed there. It does, however breed in the park. Most Nashville Warblers breed much further north, but the Cascades and Sierra, down to about Yosemite provide a southern extension to the breeding grounds. Since the Nashvilles are a sensitive species, they are studied as indicators of environmental change in Yosemite (see the Yosemite Conservancy page on this work).