Adélie penguin
Part of the Northern Party, Levick spent the austral summer of 1911–1912 at Cape Adare in the midst of an Adélie penguin rookery. To date, this has been the only study of the Cape Adare rookery, the largest Adélie penguin colony in the world, performed and he has been the only one to spend an entire breeding cycle there. His observations of the courting, mating, and chick-rearing behaviours of these birds are recorded in his book "Antarctic Penguins". A manuscript he wrote about the penguins' sexual habits, which included sexual coercion, sex among males and sex with dead females, was deemed too indecent by the Keeper of Zoology at the British Museum of Natural History, Sir Sidney Harmer, and prevented from being published.