July 26, 2011 5:37 pm
I have some type of hydrangea that attacks all types of bees/wasps. I would like to know exactly what type of wasps I’m dealing with. I’m attaching three pictures to help you identify both wasps. Can you help? Thanks
You have two different species of Thread Waisted Wasps in the genus Sphex pollinating your hydrangeas. The black was is a Great Black Wasp or Katydid Hunter, Sphex pensylvanicus, and the lighter individual is a Great Golden Digger Wasp, Sphex ichneumoneus. You may read about the Great Black Wasp on BugGuide, and you may also read about the Great Golden Digger Wasp on BugGuide. The females of both species are solitary wasps that dig a nursery that is provisioned with Katydids to feed the young. Neither species is considered aggressive.