Hey

Last weekend we had a Nashville Warbler at TNC's Cranesville Swamp reserve. We found it at the far side of the board walk (10am-ish). It was definitely on a territory, and circled around us, calling (so please don't use playback). Many times it was calling at the top of a conifer. Learn the call before you go and you should find it.

Cheers
Tim Boucher
Bethesda, MD