Where Is Your Rump?

Looking for a Yellow-rumped Warbler's yellow rump

If ornithologists speak of a bird's rump, they are not referring to the area underneath the tail as in the photo above. That area is called the undertail coverts, and is white in a Yellow-rumped Warbler. The rump is the area on the top side of the bird where the tail and back meet. In the picture below you can easily see how the Yellow-rumped Warbler got its name.

Yellow-rumped Warbler (Photo by Paul Roisen)