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Idaho State News

Idaho’s Wolf Population Has Dropped Nearly 13 Percent

R. Phillips | IDFG

BOISE – Idaho’s 2022 population estimate of 1,337 wolves declined by about 13 percent, or 206 wolves, compared with the 2021 estimate based on cameras surveys that measure the population during summer near its annual peak. 

“Wolf population reduction has been a priority of the Fish and Game Commission,” Idaho Fish and Game Director Ed Schriever said. “There’s been a concerted effort by Fish and Game staff, hunters, trappers and other partners and agencies to reduce wolf conflicts with livestock and bring the wolf population in balance with prey species, particularly elk. 

“We are encouraged by efforts that have resulted in a drop in wolf numbers, and this aligns with our long-term goal to reduce Idaho’s wolf population. We’d like to see it fluctuate around 500, which is outlined in our draft wolf management plan and aligns with the federal rule that delisted wolves,” Schriever said. 

Wolf population fluctuates seasonally

Fish and Game staff deploys cameras during summer after pups are born in the spring, which spikes the population and represents the high point of the annual population. Biologists monitor hunting, trapping and other mortality throughout the year to understand how the wolf population changes seasonally. 

Between 2019 and 2021, summer population estimates have averaged 1,548 animals, and 516 of those died on average each year, or about 33 percent of the annual population. 

Recent statewide summer population estimates and annual mortalities:

2022: Population estimate, 1,337, mortality – (July 1, 2022 through Dec. 31, 2022), 234 wolves
2021: Population estimate, 1,543, annual mortality – 486 wolves
2020: Population estimate, 1,556, annual mortality – 477 wolves
2019: Population estimate, 1,545, annual mortality – 585 wolves
(Fish and Game tabulates wolf mortalities from July 1 through June 30 each year.)

Most wolf deaths are caused by hunting and trapping, so following the summer estimate, the population starts dropping quickly because most wolf deaths occur in early fall through late winter as hunter and trapper harvests increase. 

Other wolf mortality includes those killed during, or after, preying on livestock, and wolf management done by Fish and Game to reduce predation on elk, as well as reported accidental wolf deaths. 

The 234 wolf mortalities recorded since July 1, 2022 is tracking lower than the last 5 years. 

Population reduction is a long-term goal

Fish and Game Commission in 2021 expanded wolf seasons and hunting and trapping methods. The Idaho Legislature also passed SB1211 in 2021, which further expanded methods of take and extended trapping seasons, mostly on private lands, to decrease wolf depredation on livestock.

Fish and Game staff has a draft wolf management plan that will be available in February for public review and comment that outlines population goals, actions and timelines. 

The Commission and department’s goals are similar to the U.S. Fish and Wildlife Service’s Endangered Species Act wolf delisting criteria, which suggests a management range around 500 wolves in Idaho. That number would reduce wolf and livestock conflicts while still maintaining a sustainable wolf population and healthy elk herds. 

Idaho currently has enough wolves meet the delisting criteria for the entire Northern Rocky Mountains, according the U. S. Fish and Wildlife Service’s delisting rule from 2009. The rule calls for about 1,100 wolves within the Northern Rocky Mountains, which means Idaho’s current population still meets the service’s objectives for Idaho, Montana, Wyoming and other states combined.

The delisting rule also called for the Northern Rockies wolf population to exceed a minimum of 30 breeding pairs and 300 wolves, and each state shall manage for “at least 15 breeding pairs and at least 150 wolves in mid-winter.”

Wolf Camera3.jpg

Fish and Game pioneered estimating the statewide wolf population

Idaho was the first state to use remote cameras for a statewide wolf population estimate with the first one produced in 2019.

To get the 2022 population estimate, Fish and Game crews deployed 533 cameras in July and August of 2022, which collected about 10 million photos. Biologists used artificial intelligence software to sift through those millions of photos and then applied mathematical modeling to produce a statewide estimate of the population. 

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