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Wolves’ Reintroduction Boosts Moose Recovery at Isle Royale

By Drooid · Oct 1, 2026, 3:10 AM UTC · How we work

Summary

Story summary

U.S. Isle Royale National Park officials reintroduced 19 wolves in 2018-2019.
Researchers estimate the wolf population now has over an 80% chance of persisting 20 years.
Researchers warn that inbreeding and inbreeding depression remain major concerns for the wolves.
Moose numbers dropped from about 2,000 in 2019 to 524 in winter 2026, a 75% decline.
Park staff installed 68 food-storage lockers and tightened waste-management rules to curb human-wolf conflicts.

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Story summary

U.S. Isle Royale National Park officials reintroduced 19 wolves in 2018-2019.
Researchers estimate the wolf population now has over an 80% chance of persisting 20 years.
Researchers warn that inbreeding and inbreeding depression remain major concerns for the wolves.
Moose numbers dropped from about 2,000 in 2019 to 524 in winter 2026, a 75% decline.
Park staff installed 68 food-storage lockers and tightened waste-management rules to curb human-wolf conflicts.