EXOSKELETON. “It is worth reiterating that the termites do not live in the mound, but in the subterranean nest. Thus, termite workers must somehow become aware of, and respond appropriately to, structural perturbations that may be situated as far as three meters from where they live. This betokens an impressive degree of what might be called “swarm cognition”.”
https://link.springer.com/article/10.1007/s12304-016-9256-5