I’ve talked about cleptoparasites at length, and I’ve featured photos of several cuckoo bees. One interesting thing I discovered while waiting in a field of squash to photograph bees the other day was that there is a cleptoparasite of squash bees. It is a Triepeolus species (I’m not sure which, but maybe remigatus?).
It was surprisingly easier to photograph than its host. In fact, I saw one enter a nest that already had a squash bee in it. I can just imagine that conversation, “Oh! Ah, excuse me…I must have gone down the wrong hole. You wouldn’t mind if I just leave this egg here, would you?”