What is the name of an underground tunnel an animal lives in?

these are all the underground animals AARDVARK , ANTS , ARMADILLO , BADGER , BANDICOOT , BILBY , CHIPMUNK , CLAMS , CONY , EARTHWORMS , FENNECFOX , FERRET , GERBIL , GROUNDHOG , HAMSTER , MEERKAT , MOLE , MONGOOSE , NUTRIA , PIKA , PRAIRIEDOG , RABBIT , RIVEROTTER , SANDDOLLER , SHREW , WOODCHUCK