Large Milkweed Bugs

Subject: Garden bug swarms
Location: Sioux Falls SD 57106
October 2, 2016 3:43 pm
My moms curios whats happening in her city flower garden. Sioux falls, SD. Late sept to early oct. On butterfly plants only that are seeding. One plant has larger bugs not afraid of humans. Those are easy to photograph she said. Another plant 8 feet away has small bugs very skitterish hard to get close photo. This plant also has 1 large boxelder looking bug babysitting i think.
Signature: Michael J Theesfeld

Large Milkweed Bug nymphs
Large Milkweed Bug nymphs

Dear Michael,
All the images you submitted depict Large Milkweed Bug nymphs in various stages of development, however, there are no fully winged adult Large Milkweed Bugs,
Oncopeltus fasciatus, evident in the images.  According to BugGuide both nymphs and adults feed on  “Seeds of milkweed plants” and “In the course of feeding these bugs accumulate toxins from the milkweed, which can potentially sicken any predators foolish enough to ignore the bright colors which warn of their toxicity.”

Large Milkweed Bug Nymphs
Large Milkweed Bug Nymphs

Thank you for the prompt and informative reply its much appreciated.  God Bless.

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