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HumBug: Ow! The Lady Stings

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Velvet ant on 1/4-inch graph paper shows this one is 1/2 inch long. - ANTHONY WESTKAMPER
  • Anthony Westkamper
  • Velvet ant on 1/4-inch graph paper shows this one is 1/2 inch long.

While I doubt cows actually die from the sting, this little lady is rated pretty high on the Schmidt insect sting pain index. She ranks a solid 3 on a scale from 1 to 4, a bit beyond the bald faced hornet.
Mud dauber sipping nectar from dill in my garden. - ANTHONY WESTKAMPER
  • Anthony Westkamper
  • Mud dauber sipping nectar from dill in my garden.

I disagree with Schmidt's assesment of the black and yellow mud dauber (Sceliphron caementarium)  as a 1 from personal experience. She is a striking creature said to seldom sting. Taking the term “wasp waisted” to an extreme, her long, thin pedicel (the part that connects her abdome to her thorax) is distinctive. This spider hunter builds tubular mud nests, stocks them with half a dozen or so paralyzed spiders, seals them in with a single egg and then sets about building another tube, often building a considerable cluster of them.
Mud dauber applying mud to her nest. - ANTHONY WESTKAMPER
  • Anthony Westkamper
  • Mud dauber applying mud to her nest.

Although not considered aggressive, she will sting to defend her nest. When I was about 6, one landed on my thumb. My dad said, "Don't hurt it and she won't sting you." With that she stung me for no reason I could think of, then flew away. My thumb swelled up like a plum and it left a callus that lasted for 40 years.
Mud dauber gathers mud for her nest. - ANTHONY WESTKAMPER
  • Anthony Westkamper
  • Mud dauber gathers mud for her nest.
In the case of wasps and bees, only the ladies are dangerous. The stinger appratus is actually a modified ovipositor (egg laying structure) found only in females.




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