Macaroni penguin of the body, and head and neck hunched, and general hunching of head and neck when incubating or standing at the nest. The macaroni penguin's predators consist of birds and aquatic mammals. The leopard seal ("Hydrurga leptonyx"), Antarctic fur seal ("Arctocephalus gazella"), Subantarctic fur seal ("A. tropicalis"), and killer whale ("Orcinus orca") hunt adult macaroni penguins in the water. Macaroni colonies suffer comparatively low rates of predation if undisturbed; predators generally only take eggs and chicks that have been left unattended or abandoned. Skua species, the snowy sheathbill "(Chionis alba"), and kelp gull ("Larus dominicanus") prey on eggs, and skuas
What Bird is That? Edition What Bird is That?" was published by Australia's Heritage Publishing in 2011, the latest release of Cayley’s “big bird book” complete with Lindsey’s revisions. It is 832 pages, features 769 birds and includes all 460 of Cayley’s full-colour paintings, many showing groups of related birds. New to this edition was an accompanying e-book "What Bird Call is That?", which identifies and illustrates 101 birds from "What Bird is That?", as well as providing sound files of each featured bird’s distinctive call. The sound files were provided by David Stewart. "What Bird is That?" plays a central role in Australian