when was the last wolf pack killed in yellowstone
1926 by 1926
title: History of wolves in Yellowstone text: noted wildlife biologist published his "Fauna Series No. 4—Fauna of the National Parks of the United States-Ecology of the Coyote in the Yellowstone National Park." In this report, Murie tallied the number of wolves killed as reported annually by park administrators between 1915 and 1935: Updated research in the 1980s verified that the last official killing of wolves in the park took place in 1926 when two pups found near Soda Butte Creek were killed by park rangers. The last reported wolf killed in the Greater Yellowstone Ecosystem (prior to today's legal hunting or control measures) occurred in May 1943 title: History of wolves in Yellowstone text: pens. These were the last wolves released into the park as officials believed that the natural reproduction and survival were sufficient to obviate additional releases. Wolf population declines, when they occur, result from "intraspecific strife," food stress, mange, canine distemper, legal hunting of wolves in areas outside the park (for sport or for livestock protection) and in one case in 2009, lethal removal by park officials of a human-habituated wolf. 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 title: History of wolves in Yellowstone text: History of wolves in Yellowstone When Yellowstone National Park was created in 1872, gray wolf ("Canis lupus") populations were already in decline in Montana, Wyoming and Idaho. The creation of the national park did not provide protection for wolves or other predators, and government predator control programs in the first decades of the 1900s essentially helped eliminate the gray wolf from Yellowstone. The last wolves were killed in Yellowstone in 1926. After that time, sporadic reports of wolves still occurred, but scientists confirmed that sustainable wolf populations had been extirpated and were absent from Yellowstone during the mid-1900s. Starting in title: History of wolves in Yellowstone text: near Hinton, Alberta, Canada. These wolves arrived in Yellowstone in two shipments—January 12, 1995 (8 wolves) and January 20, 1995 (6 wolves). They were released into three acclimation pens—Crystal Creek, Rose Creek and Soda Butte Creek in the Lamar Valley in Northeast East Yellowstone National Park. In March 1995, the pens were opened and between March 21 and March 31, 1995 all 14 wolves were loose in Yellowstone. Seventeen additional wolves captured in Canada arrived in Yellowstone in January 1996 and were released into the park in April 1996 from the Chief Joseph, Lone Star, Druid Peak and Nez Perce title: History of wolves in Yellowstone text: Park Service maintained its policies of predator control in the park until 1933. However, a 1975–77 National Park Service sponsored study revealed that during the period 1927 to 1977, there were several hundred "probable" sightings of wolves in the park. Between 1977 and the re-introduction in 1995, there were additional reliable sightings of wolves in the park, most believed to be singles or pairs transiting the region. Prior to the National Park Service assuming control of the park in 1916, the U.S. Army killed 14 wolves during their tenure (1886–1916), most in the years 1914–15. In 1940, Adolph Murie, a