mule deer

Collisions between vehicles and wildlife are a big problem on U.S. roads. Each year, on average, 1-2 million collisions with large animals, especially mule deer and white-tailed deer, end in 200 fatalities, 26,000 injuries, and costs exceeding $1 billion. About a third of the collisions reported on rural roads are wildlife-related, and two-lane highways with speed limits exceeding 55 miles per hour are particularly problematic.

U.S. Forest Service Pacific Southwest Research Station wildlife biologist Sandra Jacobson, a transportation ecology expert, wants to make roads safer for wildlife and people. She and partners at the agency’s Missoula Technology and Development Center have produced a video, “Avoiding Wildlife-Vehicle Collisions,” to do just that.

The mule deer on the Spanish Fork Ranger District, a part of the Uinta-Wasatch-Cache National Forest in Utah, are happy foragers these days thanks to a dedicated effort to improve their habitat and increase their numbers.

Mule deer are primarily browsers, with a majority of their diet comprised of broad-leaved, non-woody plants such as buckwheat and lupine and browse which includes leaves and twigs of shrubs and trees such as sagebrush and serviceberry. They are pickier eaters than larger animals like cattle and elk. Their body composition requires that they select these more nutritious plants and parts of plants than other types of feed like grass. Thus, they have more specific forage requirements and need of habitat that provides a sustainable diet, especially over the winter.