Two penguins, one with a limp and one that tends to bite, have been stolen from a specialist care centre on South Australia's Granite Island.
Police said thieves broke into the centre between May 30 and June 1 and stole five-year-old female Alice and two-year-old male Kennie.
Alice is micro-chipped and has a medical condition called bumble foot which causes her to limp.
While Kennie is described as aggressive and liable to bite.
Police said both penguins had special dietary and vitamin needs and were undergoing rehabilitation on Granite Island, south of Adelaide.