a toad is a mean of plant
pacific_tree_toad is tree_toad. tree_toad is frog. toads is amphibians. black_toad is amphibian. common_toad is amphibian. toad is anura. fire_bellied_toad is toad. mongolian_toad is toad. toads is aphibians. frogs_and_toads is amphibians.