Welcoming Beneficial Wasps Into the Garden

 

 

 

A Blue Mud Dauber among the Milkweed. Photo Copyright Daniel E. Levenson 2022.

 

June 3, 2022

One of the more delightful things about creating pollinator gardens, and generally replacing lawn grass or alien ornamental plants with native plants is that it’s not only butterflies and hummingbirds that show up, but a really interesting range of other types of pollinators which are perhaps less commonly noted by the casual gardener. As I’ve built up the native plant and pollinator gardens around my yard these last three years I’ve been endlessly fascinated not only with the  perhaps expected Ruby-Throated Hummingbirds that stop by on their daily rounds, or the Monarchs on the Milkweed, but by the range of other kinds of pollinators which are drawn to this little patch of native plants.

One of the first visitors I began to notice last summer once the Milkweed and Bee Balm was in bloom were two species of solitary wasps: Blue Mud Dauber (Chalybion californium) and Golden Digger Wasps (Sphex ichneumonea), both of which seem to be well-established in and around the back garden. These two species are generally not aggressive towards humans, but if you’re grasshopper in the case of the latter, or another species of mud dauber in the case of the former, it would be prudent to exercise caution: The Golden Digger Wasp hunts, paralyzes, and provides grasshoppers as food for their offspring inside a sealed tunnel, and the Blue Mud Dauber is known for finding its way into the nests of other species of Mud Dauber where, not unlike our local Brown-Headed Cowbirds with respect to other songbirds, it then removes the eggs of its near relative and leaves behind its own, using parasitism as a strategy for survival. Although I’ve yet to see these two creatures in the garden this year, my guess is it’s still a bit early, and as the Common and Swamp Milkweed in the garden move closer to flowering, these species of beneficial insects will once again be buzzing around the flowers.

Copyright Daniel E. Levenson 2022.