beaver
['African crocodile, Nile crocodile, Crocodylus niloticus', 'loggerhead, loggerhead turtle, Caretta caretta', 'amphibian, amphibious vehicle', 'tailed frog, bell toad, ribbed toad, tailed toad, Ascaphus trui', 'little blue heron, Egretta caerulea', 'Chesapeake Bay retriever', 'warthog']