The horse (Equus ferus caballus) is one of two extant subspecies of Equus ferus, or the wild horse. It is an odd-toed ungulate mammal belonging to the taxonomic family Equidae. The horse has evolved over the past 45 to 55 million years from a small multi-toed creature into the large, single-toed animal of today.
Specific terms and specialized language are used to describe equine anatomy, different life stages, colors and breeds.
Depending on breed, management and environment, the modern domestic horse has a life expectancy of 25 to 30 years.