Yellow Rump

 Two images of a Yellow-rumped Warbler.  Images were made at Historic Canoa Ranch, Green Valley AZ.

Sometimes I wonder where they come up with the names for bird species,  but this wouldn't be one of the times.  

Olympus OM-1, 150-400mm zoom at 400mm, 1/2000sec, f4.5, iso was 640 & 320.