Cathy and I took a walk along Croyden Creek early this afternoon. It has turned cool, although with the humidity in the woods and the steep nature of the trail, I was fairly warm. It was nice to get out, of course, and we only saw a few other people. We walked from the Croyden Creek Nature Center down stream almost to where it joins Rock Creek. Coming back, we turned up a side valley and came out between the two main parts of Rockville Cemetery. Back and the nature center, I took this photo of a western honey bee (Apis mellifera) on an aster of some sort.