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The campaign to restore the gray wolf in Yellowstone had its roots in a number of seminal studies related to the predator-prey ecology of the park. In 1940, Adolph Murie published Ecology of the Coyote in the Yellowstone National Park.
By the 1970s, scientists found no evidence of a wolf population in Yellowstone; wolves persisted in the lower 48 states only in northern Minnesota and on Isle Royale in Michigan. Canadian grey wolves were introduced into Yellowstone in 1995. [17] This move has returned wolves to land that was once ruled by the canine.
A cow/calf winter herd is a herd that consists only of female elk and their young. In a normal winter, defined as one where there is a decent amount of snow fall, one study found that when the groups of cows and calves were safe from predation by wolves, about 75.6-83.0% of their diet was made up of graze whereas when wolves were present this number dropped to 61.6-69.4%. [3]
A new study published Thursday in the journal Communications Biology found that a wolf infected by Toxoplasma gondii, a single-celled parasite that invades warm-blooded animals, was over 46 times ...
Yellowstone's oldest wolf made headlines last month when the 11-year-old wolf did something that hasn't been done before - she gave birth to her tenth litter of pups! Keith Merrill of National ...
Yellowstone National Park is symbolic of the American West to many. It became the world’s first national park when President Ulysses Grant signed it into existence in 1872. ... Wolves & More at ...
Winter-weakened or sick elk also play an important part of Yellowstone wolf diets, and it is estimated that over 50 percent of winter-weakened or sick elk in Yellowstone are killed by wolves. Of these, about 12 percent of carcasses were scavenged by other predators, including ravens, bald eagles, black bears, grizzly bears, and coyotes. [17]
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.