(Pepper et al. 1991; Credner et al. 1997; Patterson 2016, and as noted)
Nonbreeding workers often rest while lying on their backs.
Colony members often sleep in a large "dogpile," up to 4 individuals deep.
Image credit: © Josh More/Flickr. Some rights reserved, CC BY-NC-ND 2.0.
Naked mole-rats are known for forcefully kicking soil out of the tunnel exit during excavation (also known as "volcanoing").
Diggers work together by forming a chain, and then scaping and pushing soil to the tunnel exit.
Image credit: © Markus Lilje/iNaturalist. Some rights reserved, CC-BY-NC-ND 4.0.