Antlers are shed and regrown every year. Horns grow throughout the life of the animal. Bighorn sheep, bison and mountain goats have horns. Antlers are made of bone. Elk replace all of their hair twice a yearonce in the spring and once in the fall.
Herds offer more security because there are many eyes, ears and noses checking for danger.
There were an estimated 10 million elk throughout North America before Europeans arrived. By 1907, there were less than 100,000. Today, there are about 1 million wild elk living in 24 states and five Canadian provinces. The scientific name for elk is Cervus elaphus. Elk calves are born in late May or early June.