Flutterwing

Flutterwings were a species of insect native to the planet Gallifrey. Romana I studied their life cycle while at the Time Lord Academy. (TV: The Pirate Planet, PROSE: Set Piece) The Eighth Doctor kept a flutterwing in his TARDIS' butterfly room. (PROSE: Vampire Science)


 * The flutterwing likely went extinct when Gallifrey was destroyed at the end of the Last Great Time War. It was not specified on-screen what kind of animal the flutterwing was, only in the novel.