Meat and poultry are the edible muscle, fat, and organs of animals. Meat usually comes from grass-eating mammals but can also come from reptiles and amphibians. Poultry is the meat of birds. Because of their high protein content, many different animals and birds are eaten around the world, but in the United States, the meats most commonly eaten are beef, pork, and lamb, with chicken and turkey weighing in as poultry favorites. As culinary horizons expand, Americans are trying out less common sources of meat, such as alligator and ostrich, while interest is also turning to game animals, such as venison and quail.