via the New York Times.

According to an in-depth atlas project being undertaken by the Wyoming Migration Initiative, many species of wild ungulates (hoofed mammals) require more land than what is currently encompassed in wilderness reserves. Certain areas that are under private ownership or designated as mixed use government lands are also key to the survival of species like the bighorn sheep (whose migration routes are to the left), mule deer, elk, and others.

Studies like the one by the Wyoming Migration Initiative reinforce the idea that buffer zones to national parks or reserves are extremely important to wildlife conservation. To learn more about biological or wildlife corridors, I’d recommend the Australian Department of the Environment’s webpage on the topic, which is quite detailed and very reader-friendly.