Nearly 30 organizations have asked the U.S. Fish and Wildlife Service and U.S. Agriculture Department to vaccinate California condors in the wild to protect them from avian flu, which already has killed at least 21 of the iconic birds.

A horse that slipped its tether a week ago and ambled away from a backcountry campsite in Wind Cave National Park turned up walking along a road in the park.

A bid by Utah officials to see the boundaries of Bears Ears and Grand Staircase-Escalante national monuments shrunk should be dismissed because they have not demonstrated a cause of action for the court to consider nor has the federal government waived its sovereign immunity to allow a lawsuit against it, according to a motion filed by the federal government.

Searches were underway Monday in three national parks, two focused on missing hikers and one on missing climbers.