“Harvest is one of several factors that potentially affect wolf viewing opportunities in Denali and Yellowstone National Parks. Visitors to national parks were half as likely to see wolves in their natural habitat when wolf hunting was permitted just outside Denali National Park’s boundaries during a period from 1997- 2013. Other important factors linked to wolf viewing rates include, the proximity of wolf dens to the Park Road and the regional wolf population.
A study co-authored by researchers at the University of Washington and the National Park Service appearing April 28 in the journal PLOS ONE, examined wolf harvest and sightings data from two national parks — Denali National Park and Preserve in Alaska and Yellowstone National Park that straddles Wyoming, Montana and Idaho — and found visitors were almost twice as likely to see a wolf during periods when trapping and hunting wasn’t permitted adjacent to the parks. …”