Cicada killer wasps
I think they're both males, because the females are bigger. The males technically can't sting (and the females only do if you're really asking for it), but it's still scary to get up close to one.
Super cool creatures. The males have really poor vision and pretty much think anything that moves is a potential mating partner. So not so far off from human males. The females make one burrow per cicada they bring back. Lay that egg on it and bury it in.