Abstract
According to research by federal scientists, the number of a major elk herd that migrates from Yellowstone National Park has decreased by 10 percent from 2011. At present, there are about 4100 elks in number of elks in the herd. The population of the herd was at the peak in the year 1992. Drop in population is due to predator attacks, Extreme winter seasons and hunters. The major effect in the reduction of elk population is due to the wolves, which are re-introduced in 1995-96. At the end of 2011, the wolf population was counted to be of 11 packs ...