little ocelli

Lunch punch

this mud dauber wasp (Sceliphron caementarium) seemed distressed about something in her clay nest. Turns out it had been commandeered by a keyhole wasp (Pachodynerus nasidens), who was now aggressively asserting ownership

keyhole wasps, which hunt weevils and other small beetles, will opportunistically nest in any sort of small cavity (such as a keyhole). The existing literature on this species doesn’t say anything about taking over other wasp‘s nests, only that they sometimes refurbish abandoned nests, but I guess this one didn’t get the memo.

This isn't the worst of their mischief though- they also have a habit of building nests that clog up the airspeed measuring instruments in planes and have caused several fatal crashes.