JACKSON, Wyo. (AP) — The largest wolf pack known to exist in the West roams in northwest Wyoming.

The U.S. Fish and Wildlife Service reports 24 wolves in the Lava Mountain Pack. That is nine more than any other pack surveyed this year in Wyoming, Montana, Idaho, Washington or Oregon. The Lava Mountain Pack roams a hill country about 30 miles northeast of Jackson.

Fish and Wildlife Service wolf coordinator Mike Jimenez tells the Jackson Hole News & Guide that the pack had two litters of pups in 2014. But history suggests that the pack's jumbo size won't last much longer. Biologists say big wolf packs tend to break up.