The parasitic wasps pick up this signal and find their unwitting larval hosts.

He returns the favor by taking full advantage of his unwitting hosts.

"Sorry," she said to her unwitting host before yanking the tab closed.

In this practice, the cuckoos lay their eggs in other birds' nests and the unwitting hosts then expend their energy hatching the cuckoo's eggs.

Our unwitting host was, indeed, questing for the names of his uninvited guests.

There wasn't going to be any way they could throw themselves on the mercy of their unwitting hosts and took for anything better than a hemp collar and a short dance on the air.

That's because starting 30 years ago Ms. Brandow became the unwitting host to pilgrims paying homage to what "All in the Family" fans know as the Archie Bunker house.

It had been a big step for her to lie about her relationship to the man Vigsten in Copenhagen who was Langaas's unwitting host.

In due course, they were rescued and towed to Diego Garcia, where they made a quick repair to their vessel, thanked their unwitting hosts, and sailed away in triumph.

But my parents never did discover who had been the unwitting hosts.