• Bison wallow in dust to get rid of insects.
• The bison has thick fur that protects it from the cold.
• Calves are born reddish.

The embryo develops within the mother, with all organs forming inside. Young American bison have soft reddish-brown fur that protects them from cold and sun, and small horns just begin to grow. The species’ thick dark fur on the front of the body provides protection from cold and wind, while hooves assist in walking on grass and snow and digging in the ground. Mature bulls possess strong horns used for defense against predators and fighting with other American bison, and a powerful hump composed of muscles supports the heavy head.