Animals are multicellular, eukaryotic organisms of the kingdom Animalia or Metazoa. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their life. Most animals are motile, meaning they can move spontaneously and independently. All animals must ingest other organisms or their products for sustenance.
Insects are are among the most diverse groups of animals on the planet, including more than a million described species and representing more than half of all known living organisms.
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The domestic dog (Canis lupus familiaris) is a subspecies of the gray wolf (Canis lupus), a member of the Canidae family of the mammalian order Carnivora. The dog was the first domesticated animal and has been the most widely kept working, hunting, and pet animal in human history.
Birds are feathered, winged, bipedal, endothermic, egg-laying, vertebrate animals.
The domestic cat (Felis catus or Felis silvestris catus) is a small, usually furry, domesticated, and carnivorous mammal. Cats are often valued by humans for companionship and their ability to hunt vermin and household pests.