On 6 June 2010 I was birding at the headquarters complex at Malheur National Wildlife Refuge in southeastern Oregon when I noticed what appeared to be a slightly odd-looking Townsend’s Warbler (Dendroica townsendi) in one of the trees. I lost track of the bird and shortly thereafter heard what sounded like a rather plain song of a Yellow-rumped Warbler (D. coronata). A moment later the Townsend’s-like bird came back into view and sang the same song. Townsend’s Warblers have a rather varied sound repertoire, and I have heard them sing shortened or partial songs, but I had never heard one sing a sweet, rich “cheedle cheedle cheedle” like a Yellow-rumped Warbler before.