Mustangs | Spirit of the Shrinking West, National Geographic Magazine: Fighting Wild Horses Exhibit Dominance Behavior

Two horses rear up on a gray, fog day to face off and fight for mares.

The thick blanket of fog makes it difficult for the harem stallion to keep a watchful eye over his band. A stud challenged the dominant stallion, trying to steal mares and to take advantage of the confusion brought by the weather. Sometimes studs in a bachelor band will work together to outwit the dominant stallion.

The wild horse herd grazes in a North Dakota prairie under the watch of the International Society for the Protection of Wild Horses and Burros.

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