Colorado taps B.C. gray wolf population to re-establish its own stock

Gray wolves were exterminated in Colorado in the 1940s through hunting, trapping and poisoning

Associated Pressabout 21 hours agoabout 21 hours ago

web1_250113-cpw-bc-wolves-colorado-wolf_1
In this photo provided by Colorado Parks and Wildlife, wildlife officials release five gray wolves onto public land in Grand County, Colo., Monday, Dec. 18, 2023. The wolves were released to kick off a voter-approved reintroduction program that was embraced in the state’s mostly Democratic urban corridor but staunchly opposed in conservative rural areas where ranchers worry about attacks on livestock. (Colorado Natural Resources via AP)

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Wildlife experts are in the process of capturing gray wolves from Canada in order to release them in Colorado, effectively doubling the state’s small, recently reintroduced population.

Until recently, gray wolves were virtually extinct in Colorado, but state officials are going to great lengths to change that.

As many as 15 gray wolves will soon be released, all of them captured in British Columbia, Canada, Colorado Parks and Wildlife announced in a Jan. 11 news release. They will be put in crates, loaded into an aircraft and flown, then released in western Colorado, officials said.

The move comes after the state in 2023 reintroduced gray wolves, which were exterminated from Colorado in the 1940s through hunting, trapping and poisoning because the wolves had been targeting cattle and livestock.

The controversial effort to bring gray wolves back has had mixed success. Of the first 10 wolves brought in from Oregon, dubbed the Copper Creek pack, just six remain in the wild, with one having been recaptured and three killed, Coloradoan.com reported.

The pack has also preyed on livestock which, while not unexpected, prompted wildlife officials to relocate some of the wolves, McClatchy News reported.

Releasing the Canadian gray wolves will more than double the animal’s population in the state — and officials are just getting started.

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“CPW plans to release 10-15 gray wolves on the West Slope per year, for a total of 3 – 5 years, as outlined in the Colorado Wolf Restoration and Management Plan,” Colorado Parks and Wildlife said.

Officials said the wolves being captured in Canada don’t have a history of going after livestock.

“Gray wolves from this area of B.C. do not overlap with areas where livestock are present, so there are no concerns about reintroducing wolves that are from packs that are involved in situations of repeated livestock depredations.”

Loss of livestock is a primary reason gray wolves were wiped out from Colorado in the 40s, and it’s a real concern once again. As of August 2024, the Copper Creek pack had preyed on more than 24 livestock animals and three dogs, McClatchy reported, adding that the owners of those animals were reimbursed in cases where they filed claims.

The risks posed by reintroducing the wolves are small compared to potential benefits to the ecosystem, advocates say.

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“You’d think the sky was falling, but the fact is, it’s not. The fact is, wolves are being wolves. Most of the wolves that were reintroduced haven’t gotten into problems with livestock,” Rob Edward, president of the Rocky Mountain Wolf Project told KCNC.

— Mitchell Willetts, The News Tribune (Tacoma, Wash.)

Recreational trails disturb grizzly bears and wolves more than expected

by Michael Brown, University of Alberta

grizzly
Credit: Pixabay from Pexels

Human recreation on mountain trails is displacing grizzly bears and wolves from their natural habitats, even when the trails are hundreds of meters away, according to a new study from the University of Alberta. The research underscores the need for more effective planning to ensure that recreationists and wildlife can coexist, particularly in the busy Bow River Valley, which has long served as a natural corridor connecting the prairies to the Continental Divide.

The study was led by Peter Thompson, a former postdoctoral fellow with Colleen Cassady St. Clair in the Department of Biological Sciences. Thompson and St. Clair worked with biologists from Parks Canada and Alberta Parks who installed camera traps at more than 1,600 locations in the Bow River Valley and adjacent areas in the mountain parks between 2007 and 2022.

For the study, published in the Journal of Applied Ecology, the researchers analyzed more than one million images of humans and tens of thousands of images of bears and wolves, comparing the detection of each species in areas with different levels of human use.

Using statistical models, Thompson estimated human use over the entire landscape, then determined the likelihood that grizzly bears and wolves would be present in various areas.

Not surprisingly, nearly all large carnivores would completely avoid the areas immediately adjacent to the busiest trails. However, this displacing effect seemed to linger over large distances.

Though trails that never receive any use from humans have little to no effect on wildlife, only half of grizzlies studied would venture within 300 meters of trails with the highest human use. This effect was more pronounced in wary wolves, whose radius of comfort extended to 600 meters from the busiest trails. Thompson says these “zones of influence” caused by people are much larger than previously thought.

Human recreation pushing the forest's largest carnivores further than previously thought
Human disturbance indices for grizzly bears and wolves, as estimated by our model, for a subset of the study area that includes Banff, Alberta and Canmore, Alberta, the area’s two largest towns. Credit: Journal of Applied Ecology (2025). DOI: 10.1111/1365-2664.14837

“We initially thought bears might use hiking trails as efficient routes when humans weren’t around, but they actually avoid these areas altogether,” says Thompson, who is now a postdoctoral fellow at Simon Fraser University. “Our results show that human recreation has significant effects on wildlife, substantially influencing their behavior even hundreds of meters away from the trail.”

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Thompson adds he hopes the findings will help land managers in the Bow River Valley create safe, quiet spaces for grizzly bears, wolves and other large carnivores that require undisturbed habitats for movement.

“When trails become busier, people may not realize the extent to which they are disrupting wildlife movement and habitat security,” he explains.

St. Clair, Thompson’s former supervisor, emphasizes that parks planning in Alberta—particularly in the Canmore region, where this study was based—has increasingly focused on managing human-wildlife interactions.

“Wolves are even more affected by human recreation than grizzly bears, and they are active year-round, coinciding with winter recreational activities,” says St. Clair. “This research highlights the critical need to manage human use in a way that allows people to share the landscape with these wary predators.”

More information: Peter R. Thompson et al, Integrating human trail use in montane landscapes reveals larger zones of human influence for wary carnivores, Journal of Applied Ecology (2025). DOI: 10.1111/1365-2664.14837

Journal information: Journal of Applied Ecology 

Provided by University of Alberta 


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Apex predators captured in Canada to be flown to Colorado and released. Here’s why

By Mitchell Willetts January 12, 2025 1:23 PM| 1 Wildlife experts are capturing predators from Canada to release them in Colorado. Lance Anderson via Unsplash Wildlife experts are in the process of capturing gray wolves from Canada in order to release them in Colorado, effectively doubling the state’s small, recently reintroduced population. Until recently, gray wolves were virtually extinct in Colorado, but state officials are going to great lengths to change that. TOP VIDEOS As many as 15 gray wolves will soon be released, all of them captured in British Columbia, Canada, Colorado Parks and Wildlife announced in a Jan. 11 news release. They will be put in crates, loaded into an aircraft and flown, then released in western Colorado, officials said. The move comes after the state in 2023 reintroduced gray wolves, which were exterminated from Colorado in the 1940s through hunting, trapping and poisoning because the wolves had been targeting cattle and livestock. The controversial effort to bring gray wolves back has had mixed success. Of the first 10 wolves brought in from Oregon, dubbed the Copper Creek pack, just six remain in the wild, with one having been recaptured and three killed, Coloradoan.com reported. The pack has also preyed on livestock which, while not unexpected, prompted wildlife officials to relocate some of the wolves, McClatchy News reported. Gray wolves are native to Colorado but were extirpated from the state in large part due to intentional hunting and trapping efforts. Michael LaRosa via Unsplash Releasing the Canadian gray wolves will more than double the animal’s population in the state — and officials are just getting started. “CPW plans to release 10-15 gray wolves on the West Slope per year, for a total of 3 – 5 years, as outlined in the Colorado Wolf Restoration and Management Plan,” Colorado Parks and Wildlife said. Officials said the wolves being captured in Canada don’t have a history of going after livestock. “Gray wolves from this area of B.C. do not overlap with areas where livestock are present, so there are no concerns about reintroducing wolves that are from packs that are involved in situations of repeated livestock depredations.” Loss of livestock is a primary reason gray wolves were wiped out from Colorado in the 40s, and it’s a real concern once again. As of August 2024, the Copper Creek pack had preyed on more than 24 livestock animals and three dogs, McClatchy reported, adding that the owners of those animals were reimbursed in cases where they filed claims. The risks posed by reintroducing the wolves are small compared to potential benefits to the ecosystem, advocates say. “You’d think the sky was falling, but the fact is, it’s not. The fact is, wolves are being wolves. Most of the wolves that were reintroduced haven’t gotten into problems with livestock,” Rob Edward, president of the Rocky Mountain Wolf Project told KCNC.

Read more at: https://www.sacbee.com/news/nation-world/national/article298418708.html#storylink=cpy