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Rolf Peterson investigating the carcass of a coyote killed by a wolf in Yellowstone National Park, January 1996. Scientists have been researching and studying the impacts on the Yellowstone ecosystem since re-introduction in 1995. As the wolf population in the park has grown, the elk population, their favored prey, has declined.
In recent years, however, Yellowstone's elk population has plummeted. The Northern Herd, the only herd that winters in the park, has declined from nearly 20,000 animals in 1994 to less than 4,000 in 2013. Ecologists have linked this decline to a declining population of cutthroat trout in Yellowstone Lake, caused by invasive lake trout. With ...
Greater Yellowstone Area Wolf Pack Territories 2002 (95% MCP except where noted) * A 75% MCP was calculated for these five home ranges because of a high fluctuation in movements.
The Yellowstone Wolf Project started in 1995 and since it's become one of the most detailed studies of wolves the world. They also focus on studying the day-to-day life and social interactions of ...
The recovery of populations throughout the states of Wyoming, Montana, and Idaho has been so successful that on February 27, 2008, the U.S. Fish and Wildlife Service removed the Northern Rocky Mountain wolf population from the endangered species list. [127] As of January 2023, there are at least 108 wolves in the park in 10 packs. [128]
The 10,000 year old Grand Canyon of Yellowstone surrounds the mighty Yellowstone River. Gazing from the canyon rim into the 1,000-feet deep gorge should make even the most seasoned traveler feel ...
For Yellowstone's dedicated wildlife watchers, a good look or photo of a wolf, grizzly — or especially an elusive wolverine or lynx — makes for a good day in the field.
Map of the United States with Ohio highlighted. Ohio is a state located in the Midwestern United States. Cities in Ohio are municipalities whose population is no less than 5,000; smaller municipalities are called villages. Nonresident college students and incarcerated inmates do not count towards the city requirement of 5,000 residents. [1]