Have wolves really saved Yellowstone?

Wolf reintroduction caused unanticipated change in Yellowstone. It rebalanced elk and deer populations, allowing the willows and aspen to return to the landscape. The end to overgrazing stabilized riverbanks and rivers recovered and flowed in new directions. Songbirds returned as did beavers, eagles, foxes and badgers.



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Wolves – The re-introduction of wolves to the Yellowstone ecosystem in 1995 caused a nationwide uproar. As wolf packs spread throughout the region and attack ranch animals, the controversy is very much alive.

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As of January 2023, there are at least 108 wolves in the park. Ten packs were noted. Wolves in Yellowstone sit at the core of a larger population connected throughout the Greater Yellowstone Ecosystem. In general, wolf numbers have fluctuated between 83 and 123 wolves since 2009.

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In January 1995, U.S. and Canadian wildlife officials captured 14 wolves from multiple packs east of Jasper National Park, near Hinton, Alberta, Canada. These wolves arrived in Yellowstone in two shipments—January 12, 1995 (8 wolves) and January 20, 1995 (6 wolves).

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In Yellowstone, cost estimates on wolf recovery are from $200,000 to $1 million per wolf (AWSNA). When one remembers how many wolves were reintroduced in two years, this is a lot of money. Believing there are better ways of spending money, advocates against the wolf want this money to be redirected to other places.

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Approximately 150–200 with home ranges wholly or partially in the park. As of 2021, 1,063 estimated in greater Yellowstone.

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Until the wolves returned, this was one of the densest and most stable coyote populations in the country because of the lack of human effects, Dr. Crabtree said. In just two years, 50 percent of the pre-wolf population of coyotes has been killed.

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26–36 inches tall at the shoulder, four to six feet long from nose to tail tip. Males weigh 100–130 pounds, females weigh 80–110 pounds. Home range within the park is 185–310 square miles (300– 500 km2); varies with pack size, food availability, and season. Average lifespan in the park is four to five years.

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These large individuals of the Mountain Coyote are the present day wolves of the Yosemite region. No true wolf is known to have occurred anywhere in middle California since about 1870.

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