JACKSON, Wyo. (AP) — About an eighth of the Teton Valley's pronghorn antelope could end up spending the winter there, facing conditions that are tough even in average years.

About 50 antelope were spotted on the southeast corner of the National Elk Refuge last week. The Associated Press reported Tuesday that it remains to be seen whether they will ultimately make the migration to the Pinedale Anticline gas field with the rest of the herd or stay in the valley.

Pronghorn are poorly equipped to deal with extreme cold or hard snow. They're also at the bottom of the feeding hierarchy in competing for alfalfa pellets distributed for elk at the refuge.