Elk, Deer Most Likely Wildlife Involved in Vehicle Collisions in Grand Teton National Park

Each year collisions with vehicles kill 10 bison, on average, in Grand Teton National Park. Moose deaths are particularly troubling, as the park's moose population has been on the decline. NPS photos.

Each year nearly 100 animals, ranging from elk and deer to bison and wolves, are killed in vehicle collisions in Grand Teton National Park. Park officials keep tally of the grisly count to seek ways to make roads that run through the scenic park safer -- for both motorists and wildlife.

Four years ago, park officials launched a proactive education/ prevention campaign to reduce the apparent growing number of collisions and associated animal deaths. Despite a determined effort to educate and alert motorists about wildlife on roads, the number of these incidents appears to be fairly consistent from year to year, they say. In fact, park officials believe that the tally is likely higher than the numbers indicate, because some collisions are not reported, particularly when smaller animals are involved.

Wildlife-vehicle collision statistics for the past five years reveal that an average of 33 deer, 38 elk, ten bison, seven moose, three pronghorn, two bears and one wolf are killed each year on park roads, the park said in a release this week. In addition, a host of smaller animals such as foxes, porcupines, beavers, marmots, pine martens, sage grouse, and owls die each year as a result of collisions with automobiles. The data suggest that vehicle speed, time of day (e.g. dusk, dawn, and nighttime), and specific location (e.g. the Gros Ventre junction and adjacent area) may be factors in wildlife-vehicle incidents.

Last June, in one of the more bizarre incidents, a pronghorn antelope dashing across U.S. 26/89/91 in the park knocked two motorcyclists off their bike.

In 2006, Grand Teton National Park and the Jackson Hole Wildlife Foundation entered into a cooperative agreement to address wildlife-vehicle collisions, and implement a variety of educational outreach and mitigation measures. One of the steps taken was the placement of flashing message boards at strategic locations along Highway 26/89/191; these variable message signs caution you to be alert for wildlife and to slow down. In addition to the flashing message boards, other efforts include stationary signs placed at wildlife crossing 'hot spots,' public service announcements broadcast on the radio, flyers provided at park entrance stations, and cautionary alerts placed in the Teewinot, the park’s newspaper. Grand Teton is also working with the Wyoming Department of Transportation on developing additional mitigation measures.

In an ongoing effort to reduce wildlife deaths related to vehicle collisions, Grand Teton park managers once again urge motorists (local residents and out-of-state visitors alike) to stay alert, to slow down and to give wildlife a brake—especially during low-light conditions from dusk to dawn when animals may be difficult to see on roadways. Drivers should expect the unexpected with regard to wildlife that travel near and across park roads.

So far in 2010 three moose, two bison, an elk, a coyote and a red fox have been killed in collisions with cars, according to park spokeswoman Jackie Skaggs.

"With declining moose population in Jackson Hole, the moose (deaths) are especially troubling," she says.