Spawner- Bug Commands

A fresh batch of his children crawled out, climbing on the paper, racing toward the edges.  Each was programmed with an image of the person they were hunting.
...

He tossed one of his children onto the top of the storage container she had occupied, with a simple instinctive command programmed into it.  To seize whatever was there, to jostle, disturb.  If he gave a command, it was to bring the thing to him.  Otherwise, it was to carry it away.

It found nothing.

- Ward, Interlude 15.z