amphibian aquatic biaxial bicameral bicuspid bifid biform binocular binomial binominal bipartite bipetalous bipinnate bisexual bivalent canine cannibal carnivore cosmopolite feline gnawer herbivore insectivore invertebrate mammal mammalian marsupial marsupialian omnivore primate quadruped reptile rodent ruminant scavenger ungulate unibivalent varmint vermin vertebrate