denali park rangers maintain a constant effort to keep the wildlife wild by limiting the interaction between humans and park animals. feeding any animal is strictly forbidden, as it may cause adverse effects on the feeding habits of the creature. visitors are encouraged to view animals from safe distances. in august 2012 the park experienced its first known fatal bear attack when a lone hiker apparently startled a large male grizzly while photographing it. analysis of the scene and the hiker's camera strongly suggest he violated park regulations regarding backcountry bear encounters, which all permit holders are made aware of. certain areas of the park are often closed due to uncommon wildlife activity, such as denning areas of wolves and bears or recent kill sites.