To be considered domesticated, a population of animals must have their behavior, life cycle, or physiology systemically altered as a result of being under human control for many generations. Animals included in this list that do not fully meet this criterion are designated "captive-bred" or semi-domesticated. The term domestic animal applies to domesticated animals that actually live in physical proximity to humans, such as pets and guard animals, or even food species kept very close, e.g. to live on domestic food scraps and/or so their body heat can be used as 'stable heating'.
This list is organized by the original or primary purpose for which the animals were domesticated. Animals with more than one significant human use have been listed in more than one category.
The body and natural produce, as well as the labour and senses of various animals have been made useful for a wide variety of human activities. In this section profitable uses are treated; naturally other purposes usually also have an economical value.
See the article on Working animals for various ways in which the muscle power, sensorial functions, and other natural abilities of animals (not always domesticated) are put to use in the service of human culture and for military application.
While nearly all species can potentially be involved in research related to their natural behaviour, there are a limited number of species that are frequently chosen, for convenience and/or as 'representative' substitute for test which would be unethical to perform on human test persons.
(See main article on pets for animals whose main purpose is human enjoyment, rather than value)
A few common examples:
While many more wild species can be put on display after capture in the wild or bred in captivity intended to resemble natural reproduction as closely as possible in scientific and/or survival programs, an impressive number of species is bred, often alongside (often illegal) capture in the wild and collected, not for any useful purpose to the owner (listed above or under working animal) but for breeding in view of possible extinction in their natural habitat and/or for display in private or for the public (not necessarily managed for profit), as in an aquarium or vivarium, in zoos, safari parks etc. This is the case with many (especially tropical) fish, butterflies, song - and birds etc.