Environmental groups filed a lawsuit Monday seeking to stop the federal government from giving states more leeway to kill protected gray wolves in the Northern Rockies. The lawsuit, which was filed in ...

Oregon’s wolf population increased last year after four years of nearly flat growth, with the animals continuing to expand their habitat westward, according to a new state report. The population grew ...

An endangered Mexican gray wolf named Taylor has repeatedly traveled north of a designated recovery area in New Mexico. Some advocates say the wolves' movements indicate a need to expand their ...