A project aimed at reducing the number of nonnative burros in Death Valley National Park was scheduled to begin Monday and run through mid-May. It's a project that could create traffic delays of up to 4 hours on a number of remote, unpaved roads during helicopter operations.

WAG' bag: A plastic bagging system used for containing human waste.

Valles Caldera National Preserve in New Mexico was closed Saturday due to a wildfire burning in the Jemez National Forest, while growing fire conditions prompted other park units in the region to institute restrictions on campfires, grills, lanterns, and smoking in the open.

Forty wood bison from Elk Island National Park in Alberta have relocated to Alaska.