Small game in Iceland consists mostly of seabirds (puffin, cormorant and great black-backed gull) and waterfowl (mallard, greylag goose and pink-footed goose). The meat of some seabirds contains fish oil. It is placed in a bowl of milk overnight to extract the oil before cooking. Ptarmigan is also found in Iceland, but hunting of them has been banned because of dramatically declining stocks since the late 20th century. Ptarmigan, served with a creamy sauce and jam, has been a traditional Christmas main course in many Icelandic households.