I just posted a minute-long recording of a Black-capped Vireo singing near a dam in Oklahoma. The dam was pretty noisy, but for the most part it's in the background. Please don't use this recording for "playback" in the field! I just posted it so you can appreciate the cool, complex, varied song of this exquisite species. I was only able to get recognizable photos of one individual, but you can see what little I have at my Black-capped Vireo photo and sound gallery. Oh, darn--looks like I'll have to go back to the Wichita Mountains again.