The domestic cat (Felis catus or Felis silvestris catus) is a small, typically furry, domesticated, and carnivorous mammal. They are often called house cats when kept as indoor pets or simply cats when there is no need to distinguish them from other felids and felines. Cats are often valued by humans for companionship and for their ability to hunt vermin. There are more than 70 cat breeds; different associations proclaim different numbers according to their standards. The International Progressive Cat Breeders Alliance (IPCBA) recognizes 73 cat breeds while TICA (The International Cat Association) recognizes 58, CFA (The Cat Fanciers' Association) recognizes 44 and Federation International Feline (FIFE) recognizes 43.