I have a succulent plant blooming in my front yard, and it's attracting these little bees, which I think are Megachile species, a leaf-cutter bee.



They are very fast-moving, and camera shy as well, but I was able to capture this one with its abdomen raised. I'm not sure why they do that, but a bit of googling tells me that these bees don't collect pollen in "baskets" on the hind legs the way honeybees do, but some of them collect pollen on the underside of their abdomen. This one apparently hasn't collected anything yet though.