In 2009, as wildlife managers and biologists grappled with the problem, Chamberlain began a five-county study in North Carolina, in which he and his team affixed tracking collars to 41 coyotes. Over time, they discovered that there are essentially two types of coyotes: residents, which make up about 70 percent of the population; and transients, which compose the remainder. Resident coyotes, Chamberlain observed, have relatively small home ranges of 2 to 25 miles. Transients, on the other hand, may roam 150 miles, presumably looking for a home range to open up. Once a resident coyote dies, a transient will settle in and claim the territory within a matter of weeks. This helps explain why trapping efforts weren’t working. “For every 10 coyotes you remove, three were just passing through,” Chamberlain says. “And if you’re removing transients, you’re not really having any effect.” Shooting the occasional coyote really makes no difference in what happens to the deer herd.