Blue-Grey Gnatcatcher

Here is a Blue-Grey Gnatcatcher, Polioptila caerulea, tending her nest just outside the Anza Borrego Wildlife Preserve Guest Center. I saw her hopping around and followed her back to her nest for the photograph. I didn't see the babies pop up in spite of all the fussing she was doing around the nest. Perhaps she was still in construction? However, if they were in there, they're pretty well protected up there in that very spiny cactus.