The crazy ants nest in walls, crawl spaces, house plants or empty containers in the yard, researchers said.

CNN: 'Crazy ants' a threat in southern U.S.

In Illinois, Shannon Wilfong is charged with child abduction, allegedly having forced 6-year-old Richard K. Wilfong Chekevdia to live in seclusion and be hidden, at times in crawl spaces and the attic, for nearly two years, according to court documents.

CNN: The story

Boston Dynamics will apply that same dynamic stability to Atlas, a headless humanoid that can walk on two legs, squeeze sideways through narrow spaces or crawl on its hands and feet.

FORBES: Magazine Article

Insects tend to crawl into small, dark, moist spaces.

NEWYORKER: Swimming