Bald-faced Hornet

This is a difficult critter to photograph as the one or two individuals that patrol the 21/4 acres at any given time are always in flight and rapidly darting about. I have never seen one land. They are voracious predators and pounce and any kind of dark mark on the flowers and anything that moves. They seem to be out of balance with not major predators here. The land is being restored from a several decade long "mowing" regiem which left little other than poison ivy and no frogs until we stopped mowing.