Chalcids are parasitoids of several groups of insects including Diptera (flies), Lepidoptera (butterflies and moths), Coleoptera (beetles), and Hymenoptera (true bugs). Some deposit eggs inside their hosts’ eggs while others attack the nymphs.
Mantises are ambush predators are usually green, brown, or gray in color to camouflage from not only their predators but their prey! Mantises are known for their extra bendy forelimbs that give the appearance that they are praying.
Though these wasps can be known for stings, they are not usually aggressive unless they are protecting their nests. They are also not scavengers such as yellow jackets, so they are less likely to aggravate your next picnic. However, they are fantastic pollinators and predators.