Since their protection under the Endangered Species Act, wolf populations have been making a comeback in the continental United States. Conservationists have argued that the presence of wolves and other apex predators, so named because they have no known predators aside from people, can help keep smaller predator species in check.
Click here for original story, Coyotes, bobcats move into human-inhabited areas to avoid apex predators, only to be killed by people
Source: Phys.org