joshuamilnes's Identifications

On dogbane in a mixed ornamental planting. I'm not aware of any milkweed nearby, though the plants could be in a neighbor's backyard.

I read there are indications that they are "shown to sequester cardenolides from their host plants", but "Despite the fact that sequestration in milkweed bugs is comparatively well studied, the potential effects of the quantitative and structural variation of dietary cardenolides in milkweed bugs against their predators have not yet been tested empirically."
-- https://pmc.ncbi.nlm.nih.gov/articles/PMC7469174/