Horses' anatomy enables them to make use of speed to escape predators and they have a well-developed sense of balance and a strong fight-or-flight response.
Related to this need to flee from predators in the wild is an unusual trait: horses are able to sleep both standing up and lying down.
The traditional standard for height of a horse or a pony at maturity is 14.2 hands (58 inches, 147 cm).
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, Eohippus, into the large, single-toed animal of today.
Depending on breed, management and environment, the modern domestic horse has a life expectancy of 25 to 30 years.
This point is used because it is a stable point of the anatomy, unlike the head or neck, which move up and down in relation to the body of the horse.
These feral populations are not true wild horses, as this term is used to describe horses that have never been domesticated, such as the endangered Przewalski's horse, a separate subspecies, and the only remaining true wild horse.