2014 Yellowstone Wolf Report Download

Wolf from Canyon Pack near Mammoth Hot Springs in Yellowstone

Wolf from Canyon Pack near Mammoth Hot Springs in Yellowstone

December 3, 2015, the National Park Service has published its annual report about the numbers and health of reintroduced wolves in Yellowstone National Park.

There were at least 104 wolves (up from 95 wolves in 2013) in 11 packs (up from 10 packs in 2013), including nine breeding pairs, living primarily in Yellowstone National Park during December 2014.

Pack size in 2014 ranged from 2 to 14 and averaged 9 wolves. Forty pups survived to year-end, including 17 in northern Yellowstone and 23 in the interior of the park. An average of 4.4 pups per pack (82%) survived in the nine packs that had pups. For the first time, the size of a wolf pack was estimated via genetic sampling methodology, using scat
samples from a den site.

2014 Wolf Territories in Yellowstone

2014 wolf territories in Yellowstone

The 11 packs with some or all of their territory within Yellowstone National Park included: 8 Mile, Prospect Peak, Junction Butte, 911M Group, Lamar Canyon, Cougar, 755M Group, Canyon, Mollie's, Bechler, Snake River, and Yellowstone Delta.

Yellowstone Wolf Populations from 1995 - 2014

Chart of Yellowstone wolf population from 1994 to 2014

Wolves were reintroduced to Yellowstone in 1995 with 14 animals that were captured in Canada. In 2003, the wolf population peaked with and estimated 174 animals. Although the 104 wolf tally from 2014 is lower, the wolf population has made a slight increase in the last three years.

Wolf Kills in 2014

Staff detected 227 kills probably made by wolves during mid-November through mid-December in 2014, including 148 elk, 20 bison, 13 mule deer, 10 deer of unknown species, five coyotes, three moose, three wolves, one badger, one beaver, one bighorn sheep, one goose, one raven, one pronghorn, and 19 unidentified animals.

Wolf Deaths in 2014

Five radio-collared wolves died in 2014. Two were harvested outside of the park, one was killed in an avalanche, one was killed by other wolves, and one was a capture-related mortality. One wolf was an old adult, two were adults, and two were pups.

Download Report [PDF]



2013 Yellowstone Wolf Report Download

Sept 22, 2014: How many wolves were in Yellowstone in 2013, what were their wolf pack territories, and what were their kills.

Wolf hunting patterns. Photo courtesy Public Library of Science

How Yellowstone Wolves Hunt Revealed in Research Report

Yellowstone wolves pick their prey depending on wolf pack size. Small packs attack elk. Larger packs attack bison.

Gray Wolf Howling

Yellowstone Wolf Population Increased in 2014

According to the U.S. Fish and Wildlife Service, the Wyoming wolf population grew by 9 percent in 2014. There are 104 wolves in 11 packs in Yellowstone.

Dave Shumway wolf 06 featured photo

Yellowstone Wolf 06 Remembered. Photos by Dave Shumway

Wolf 832AF (AKA "06" - for the year she was born) was the Alpha Female of the Lamar Canyon Pack killed on Dec 6, 2012 as part of Wyoming's wolf hunt.

yellowstone wolves off endangered species list

Changes Seen a Decade After Yellowstone's Wolf Reintroduction

Changes to Yellowstone 10 years since the 1995 wolf reintroduction program - 306 inhabited the ecosystem and created a balance between predators and prey.

West Yellowstone Grizzly & Wolf Discovery Center. Photo by John Williams.

Grizzly & Wolf Discovery Center

Complete your vacation to Yellowstone and Grand Teton national parks by visiting the not-for-profit Grizzly & Wolf Discovery Center in West Yellowstone, Montana. Observe live bears and wolves in naturalistic habitats.

Yellowstone Wolf Howling in Winter

Concerns Remain About Yellowstone Wolf Population

In March of 2013, officials estimated that just 71 adult wolves reside within Yellowstone’s boundaries, a 14-year low and less than half of 2007’s total.

Yellowstone Wolf Howling in Winter

Gray Wolves Increase Tourism in Yellowstone National Park

Ecotourism in Yellowstone has increased since gray wolves were reintroduced to the ecosystem, boosting local economies by an estimated $5 million per year.

Coyote at the Madison River in Yellowstone in winter

Yellowstone Wolf And Coyote: Brothers That Don't Get Along

Today, wolves are healthy in the park and coyotes are rarer. Researcher Bob Crabtree has noted that the previously-abundant coyotes have dropped off fifty percent from pre-wolf years.