What color is primarily associated with mule deer's tail?

The color primarily associated with a mule deer's tail is white. This distinctive feature helps to differentiate mule deer from other deer species. The white tail, which can appear prominently when the deer is startled or running, serves a function in communication among deer. When a mule deer lifts its tail, it can signal alarm to other deer in the vicinity, alerting them to potential danger. This characteristic is particularly noticeable during their natural behaviors in the wild, making it an important aspect of identifying the species correctly. The lighter color of the tail against the usually darker body fur stands out, which further aids in visual communication within their habitat.