Waterton was a skilled taxidermist and preserved many of the animals he encountered on his expeditions. He employed a unique method of taxidermy, soaking the specimens in what he called "sublimate of mercury". Unlike many preserved ("stuffed") animals, his specimens are hollow and lifelike. He also displayed his anarchic sense of humour in some of his taxidermy: one tableau he created (now lost) consisted of reptiles dressed as famous English Protestants and entitled "The English Reformation Zoologically Demonstrated". Another specimen was the bottom of a howler monkey which he turned into an almost human face and simply labelled "The Nondescript". This specimen is still on display at the Wakefield Museum, along with other items from Waterton's collection.