Penguin

Penguins are birds that live in cold or hot places. Frobisher took on the form of a Penguin as his wife Francine had been fond of them. (DWM: The Shape Shifter) They mostly gather in polar regions. (DWM: Voyager)

Penguins were among the animals kept in a British zoo on which Cedric Matthews tested his aggression-enhancing formula. (TVC: The Arkwood Experiments)