Mustang
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The mustang is a free-roaming horse of the Western United States, descended from horses brought to the Americas by the Spanish conquistadors. Mustangs are often referred to as wild horses, but because
Mustang adopted from the Bureau of Land Management
Free-roaming mustangs near Chinle, Arizona
Mustang mare and foal with stallion in the West Warm Springs HMA (Herd Management Area) in Oregon
Large herd of free-roaming mustangs galloping through the plains of Utah
Evolution of the horse
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The evolution of the horse, a mammal of the family Equidae, occurred over a geologic time scale of 50 million years, transforming the small, dog-sized, forest-dwelling Eohippus into the large, single-
Skeletal evolution
Extinct equids restored to scale. Left to right: Mesohippus, Neohipparion, Eohippus, Equus scotti and Hypohippus.
Restoration of Eurohippus parvulus, a mid- to late Eocene equid of Europe (Museum für Naturkunde, Berlin)
Restoration of Phenacodus