Within the greater Yellowstone ecosystem, there are roughly 480 wolves occurring in 75 packs, distributed throughout eastern Idaho, southwestern Montana, northern Wyoming, and Yellowstone. Of those, in 2011 approximately 18 packs spend some or all of their time within Yellowstone National Park. Within the park, no hunting of wolves is allowed. Outside the park, regulated hunting is allowed and managed by the respective states where wolves occur. Because wolves do not recognize political boundaries, and often move between different jurisdictions, the harvest of some wolves that live within the park for most of the year, but at times move outside the park, occurs.