Gray wolves return to California after almost a century.

When Europeans arrived in North America, there were 2 million wolves, including about 380,000 wolves in what became the western United States, scientists say.

Pioneers, settlers and cattlemen feared the predators. Gray wolves were wiped out in California by the mid-1920s and all but exterminated in 48 states by the 1930s. In 2014, the California Department of Fish and Wildlife added gray wolves to the state's endangered species list.