 White-tailed deer are the most widely distributed wild ungulate in North and South America. Although they're more common in the eastern U.S., they can be found in many parts of Wyoming. Compared to mule deer, white-tail are usually smaller in body size, have regular-sized ears, and have a distinctive white underside of their tail, hence the name. This white-tail is lifted and used like a flag when deer are alarmed to warn others of impending danger. The antler structure of mule and white-tail is also different. White-tail antlers are smaller, curve-forward, and are often atypical. Mule deer are more common in Wyoming, and there is some concern that white-tail are increasing in numbers and pushing mule deer out of their traditional range. White-tail are very adaptable to different habitats, but are often found in lower elevations and on agricultural fields in Wyoming. When white-tailed deer wave their white flag, they aren't surrendering. They're just warning others so they aren't ambushed. From the University of Wyoming Extension, I'm Mae Smith, Exploring the Nature of Wyoming.