Caecotroph

Vocalizations include food recruitment calls, high-pitched contact and aggressive chirps, a mating call, a toilet-assembly call, and vocalizations specific to pups, such as squawks when pups are stepped on and caecotroph-solicitation chirps.

He finds the caecotrophs revolting, consisting as they do of semi-digested herbage, discharged through the anus and reswallowed two or three times a week.