The horse (Equus caballus) is a hoofed, odd toed grass eating mammal of the family Equidae subdivision Perissodactyla (odd-toed); characterized by an undivided hoof formed by the third toe and its enlarged horny nail, a simple stomach, a mane on the neck, and by six incisor teeth in each jaw, seven molars on either side of both jaws, and by two small canine teeth in the upper jaw of the male, rarely in the female.
There are a number of varieties of horse, popularly known as breeds. The adult male horse is called a stallion, the adult female a mare. A stallion used for breeding is known as a stud. A castrated stallion is popularly called a gelding. A young horse is called a foal, with a male foal being called a colt and a female foal being called a filly.
Horses are among the best adapted of the 'flight' mammals. They have very large eyes capable of seeing in two directions at once, ears which can rotate through 180 degrees and judge distance to a perceived sound, and can reach a speed of 30 mph from a standing still position in less than one second. The horse has a very large heart and enormous lungs powering very large rear leg muscles which allow it to run very fast to escape danger. The horse's long head allows it to graze and see over the top of the grass at the same time, keeping watch for approaching danger. The horse's tail is used as a rudder to help with stearing when running fast, and also as a fly-whisk to whip away flies and other irritations.
When bored or agitated, horses' paw the ground with their rear leags. Stallions fight with their front legs and also bite, trying to ham string their opponent. When a horse wants to harm an opponent, or person, they use their front legs. The rear legs may be used to brush away irritations, and while powerful and dangerous are not used with the intention of causing real harm. War horses, used by mounted soldiers in the Mediaeval period, were trained to attack the enemy and would bite the face off foot soldiers who got close. Research Horse
Abbreviations
Research Horse
