They seem tor prefer sleeping mats, beds and car seats. However, I’ve had them fall asleep in the middle of a hallway during a raid on a school, a few feet away from a horde of ankle-biters. I can’t seem to keep any alive for very long anymore, they tend to die of infection and/or stupidity. I lost the last one when he jumped into a radioactive hole in the ground and couldn’t climb out.
I’ll spawn one in and observe him carefully in a controlled environment. He will be named Test Subject Zeta…