It is one of the largest deer species. In many parts of the world the meat (venison) from Red Deer is widely used as a food source. Red Deer are ruminants, characterized by an even number of toes, and a four-chambered stomach. Although at one time Red Deer were rare in some areas, they were never close to extinction (GNU Free Documentation License).

Once this cat was quite common in all of Europe. By the middle of the 19th century, it had become extinct in most countries of Central and Western Europe. Recently, there have been successful attempts to reintroduce lynx to forests (GNU Free Documentation License).

Though once abundant over much of Eurasia and North America, the grey wolf inhabits a very small portion of its former range because of widespread destruction of its habitat, human encroachment of its habitat, and the resulting human-wolf encounters that sparked broad extirpation. Considered as a whole, however, the grey wolf is regarded as being of least concern for extinction according to the International Union for Conservation of Nature. Today, wolves are protected in some areas, hunted for sport in others, or may be subject to extermination as perceived threats to livestock and pets (GNU Free Documentation License).

One of the earliest animals to be domesticated for agricultural purposes, sheep are raised for fleece, meat (lamb or mutton) and milk. A sheep's wool is the most widely used of any animal, and is usually harvested by shearing. Ovine meat is called lamb when from younger animals and mutton when from older ones. Sheep continue to be important for wool and meat today, and are also occasionally raised for pelts, as dairy animals, or as model organisms for science (GNU Free Documentation License).