Registries also are considered the authority as to whether a given breed is listed as a "horse" or a "pony". There are also a number of "color breed", sport horse, and gaited horse registries for horses with various phenotypes or other traits, which admit any animal fitting a given set of physical characteristics, even if there is little or no evidence of the trait being a true-breeding characteristic. Other recording entities or specialty organizations may recognize horses from multiple breeds, thus, for the purposes of this article, such animals are classified as a "type" rather than a "breed".
The breeds and types listed here are those that already have a Wikipedia article. For a more extensive list, see the List of all horse breeds in DAD-IS.
Horses are members of Equus ferus caballus that generally mature to be 14.2 hands (58 inches (150 cm)) or taller, but many breed registries do accept animals under this height and classify them as "horses," as horse characteristics include factors other than height. For the purposes of this page, if a breed registry or stud book classifies the breed as a horse, it is listed here as a horse, even if some representatives are pony-sized or have some pony characteristics. Pony breeds are listed in the next section, below.