11 Amazing Animal Appendages : Discovery News. Chameleon Tongue Watch out, hawk moth: the tongue of adult cameleon is as long as the animal's body and tail combined. It also moves crazy fast, reaching speeds of up to 13.4 miles per hour. That's not actually possible with muscle power alone, found a study published in the journal Science earlier this year. The tongue is spring loaded by unique elastic collagen structures that give the tongue muscle its mojo.