What is the funniest zoo sign you have seen? Not one meant to be funny, but one that made a stupid mistake? Here are two of my favorites: Marmoset (With a picture of Africa on it!) A sign with the common name listed simply as Porcupine, the scientific name reading Erethizon dorsatum, and the picture showing a Brazilian Prehensile-Tailed Porcupine. The cage had a Southern African Crested Porcupine in it.