In many cases, the cause was a fall from an overlook or a cliff, or a drowning. Car accidents are also a prime factor. Unfortunate motorists have driven off the road while admiring the view, or stopped in the middle of the road to sightsee, only to be hit from behind. Park experts have their theories as to why people take risks, especially when it comes to animal encounters. They want that picture and go to extremes to get it, including extending their hand.
People have a false sense of security.
It ain't Disneyland. An increase in foreign visitors adds to the problem. Unfamiliar with American animals, they might assume that if a creature is not behind bars, it must not be dangerous. Some Americans have similar misconceptions. Glacier National Park's chief ranger, Stephen Frye, was in Yellowstone in 1991 when he saw a family approach grazing bison.