|Solitary bee nesting sites? Cat added for scale. Photo by Anne Hars.|
Just as I was about to arrogantly suggest to my neighbor Anne that she mulch her garden paths, we spotted what I believe to be some sort of ground nesting bee activity. We found neat little holes scattered about the the middle of a dirt path. More appeared today.
According to Attracting Native Pollinators: The Xerces Society Guide to Conserving North American Bees and Butterflies and Their Habitat, 70% of solitary bees (not to be confused with honey bees) build their nests in open, dry spots of dirt. While I’m all for mulch to build soil and suppress weeds, the Xerces Society makes a good case for keeping a small part of your yard bare and thus open for native bee habitat.
In case these are the infamous Los Angeles sandworms, Anne plans on avoiding rhythmic walking in the backyard over the next few weeks.