Mustang horses

"A Mustang is a free-roaming horse of the North American west that first descended from horses brought to the Americas by theSpanish. Mustangs are often referred to as wild horses, but there is debate over terminology. Because they are descended from once-domesticated horses, they can be classified as feral horses."
"Today, Mustang herds vary in the degree to which they can be traced to original Iberian horses. Some contain a greater genetic mixture of ranch stock and more recent breed releases, while others are relatively unchanged from the original Iberian stock, most strongly represented in the most isolated populations."
info and image from wikipedia