Echidnas, also known as spiny anteaters, are four extant mammal species belonging to the Tachyglossidae family of the monotremes. Together with the Platypus, they're the only surviving members of that order. Although their diet consists largely of ants and termites, they're not actually related to the anteater species. They live in New Guinea and Australia. The echidnas are named after a monster in ancient Greek mythology. Description Echidnas are small mammals that are covered with coarse hair… (More on Tachyglossidae)