Yellow flies.
Aggressive biters.
Yellow flies — hate them, not as much as sweat bees but close. I keep some hen turkeys around to hang out with us when we BBQ because hen turkeys love to eat yellow flies and they are fast enough to catch them.
Yellow flies are attracted to moving blue objects so don’t wear blue.... some folks paint a blue bucket with tanglefoot [a sticky substance from the lawn and garden center] and mount that bucket on a stick attached to their lawn tractors....catches a lot of the bastards when mowing.