Subject: What’s this bug
Location: Black Hills National Forest SD
September 15, 2016 6:30 pm
Hello, these bugs were swarming around our house, falling on the roof like rain drops from the sky. We live in the Black Hills in South Dakota. Lots of ponderosa pine trees and some spruce. We saw them in September.
Signature: Dan


Dear Dan,
This is a Backswimmer, an aquatic True Bug that is also capable of flying.  Are you currently experiencing a dry spell?  It is possible that a nearby pond is drying out and these Backswimmers are seeking a new aquatic environment.  You can compare your image to this BugGuide image of
Notonecta undulata.  Of the family, BugGuide notes:  “Aquatic bugs that often swim upside-down. When resting at the surface, body is typically tilted with the head downward.”  BugGuide also notes that they are also commonly called “Water Bees, Water Wasps” because they occasionally bite swimmers.

Thanks so much. That’s exactly what it is. Not knowing was driving us crazy.  Dan

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