The two facing each other look like males to me possibly Paper wasp or miner
bees. They will take shelter over night in curled leaves. The black bug on the stem in the foreground looks about the right size and shape for a leaf cutter bee. Miner
bees build their solitary nests in sandy soil. They and leaf cutters work in hot weather after mason bees are finished. Paper wasps have open hexagon cells and
feed their larval from soft bodied insects.