Lately, I've been seeing swarms and swarms of these tiny hemipterans at the arboretum. I thought they were ants at first, but they're actually smaller than ants, and they're clearly true bugs. I'm pretty sure they're seed bugs, (Xyonysius californicus). Those round dead-leafy looking things are actually tiny weed seeds, and I'm wondering if the bugs eat them. You can click on the picture to enlarge it. Then maybe you can see the bugs better.


Here are some of them right on the top of a big barrel cactus.

This is as close as I could zoom and crop.