An Eruption of Hemiptera

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I took a short bird walk, as I often do, through Elyria Canyon Park this morning. Unlike yesterday's fairly active day, today was a little boring with roughly half the species I had yesterday after one pass through the park. I decided not to walk back through and went home instead. There was one occurrence of interest, and that was an eruption of Hemiptera (true bugs) along one short section of trail. I went through my insect identification guides and did some googling, but couldn't come up with a species-level identification. They seemed to be mostly feeding on young tumbleweeds.