Shivers the Penguin was a character who appeared on Sesame Street a few times during the late 1970s to early 1980s, including an appearance in Big Bird in Australia. The puppet was designed so that Shivers could be carried by Big Bird or sit on Big Bird's lap, allowing Caroll Spinney to perform both characters at the same time, with his left hand manipulating Shivers' mouth while his right hand worked Big Bird's mouth. On at least one occasion, the characters sang a song together.
Shivers was mentioned in a New York Times article on Spinney, "At first, [Big Bird] was supposed to be only an incidental character on the show, but he drew so large a following he was soon one of the major Muppets. Mr. Spinney, meanwhile, took on the additional characters of Oscar the Grouch, Shivers the Penguin and Bruno the Trashman."