axolotl, mud puppy, Ambystoma mexicanum
['hognose snake, puff adder, sand viper', 'American alligator, Alligator mississipiensis', 'echidna, spiny anteater, anteater', 'tiger beetle', 'rule, ruler', 'beaver', 'polecat, fitch, foulmart, foumart, Mustela putorius']