Toad

Toads were amphibious creatures native to Earth. The natterjack toad was one of the endangered species that Harrison Chase cited Richard Dunbar as wanting to save. (TV: The Seeds of Doom)

When the Fourth Doctor was accused of being the Evil One in the myths of the Sevateem, he threatened to turn them all into toads. (TV: The Face of Evil)

Bernice Summerfield went to a boarding school on Mal Oreille as a child, where she discovered that the matron of the school was in fact a toad feeding on the students. (PROSE: Biology Lesson on Mal Oreille)

Torm had a humanoid species called "Toad-men". (COMIC: The Body Snatcher)

Due to misinformation from Mr Smith, Sky Smith was under the impression that the dish "toad in the hole" actually had toad in it. (TV: The Curse of Clyde Langer)