The American antelope or pronghorn is a native of the plains near the Rocky Mountains. Nearly always the upper parts of its body are yellowish brown in color, while the under parts, the sides and the head and throat and the buttocks are white. It sheds the bony sheath of its horns every year. It may be worth noting that this creature is known also by the names of prongbuck, pronghorned antelope, cabrèe and cabut.