echidna, spiny anteater, anteater
['isopod', 'American alligator, Alligator mississipiensis', 'sea cucumber, holothurian', 'American coot, marsh hen, mud hen, water hen, Fulica americana', 'king penguin, Aptenodytes patagonica', 'fox squirrel, eastern fox squirrel, Sciurus niger', 'macaque']