The cat, also called the domestic cat or house cat, is a small carnivorous mammal of the subspecies Felis silvestris catus. Its most immediate pre-domestication ancestor is believed to be the African wild cat, Felis silvestris lybica. The cat has been living in close association with humans for somewhere between 3,500 and 8,000 years[1]. There are dozens of breeds of cat, some hairless or tailless as a result of mutations, and they exist in a variety of different colors. They are skilled predators and have been known to hunt over one thousand different species for food. They are also intelligent animals, and some can be trained or learn by themselves to manipulate simple mechanisms such as lever-handled doors and flush toilets. They communicate by calling ("meow"/"miaou"), purring, hissing, growling, chirping, clicking, grunting, and about a hundred other vocalizations [3] and body language. Cats in colonies use a mix of vocalizations and body language to communicate with each other. Because the domestication of the cat is relatively recent, cats may also still live effectively in the wild, often forming small colonies. The cat's association with humans leads it to figure prominently in the mythology and legends of several cultures, including those of the ancient Egyptians, ancient Chinese, and Norse.