The number of gray wolves in Washington nearly doubled in the past year, according to a new survey released Friday by the state Department of Fish and Wildlife.

The last building block of the Obama administration's strategy unveiled Wednesday to keep the northern spotted owl from extinction nearly doubles the amount of Northwest national forest land dedicated to protecting the bird by the Bush administration four years ago.

A half mile below the ground at Prudhoe Bay, above the vast oil field that helped trigger construction of the trans-Alaska pipeline, a drill rig has tapped what might one day be the next big energy source.

A wolf from Oregon that has been looking for love in Northern California is getting the cold shoulder from one of the counties he has visited.

A group that teaches people to track animals in the wild has snapped photographs that appear to show a rare mountain fox found in Northern California but long thought to be gone from Oregon's Cascade Range.

The Oregon Court of Appeals has ruled that conservation groups have a good chance of overturning a state order to kill wolves blamed for attacking livestock.

U.S. officials illegally allowed a Canadian company to begin preparing the route for its proposed 1,700-mile-long oil pipeline from western Canada to Texas even though the project hasn't gained final government approval, three conservationist groups...

The giant Palouse earthworm will not be listed for protection under the Endangered Species Act because recent information indicates the worm might be more widespread than previously thought, the U.S. Fish and Wildlife Service said Monday.

Alaska Native groups worried about losing tax revenues and royalties from oil development filed a lawsuit Friday challenging the federal government's designation of critical habitat for threatened polar bears on the state's oil-rich North Slope.