often not sufficient trees and smaller trees have been damaged by ropes rubbing over bark. Bear bagging can also be dangerous and resulted in a camper's death in 2011. Bears are also effective climbers who climb trees to retrieve hung food or bite through ropes. In many areas, such as Yosemite National Park, The Maroon Bells-Snowmass Wilderness, and Denali National Park land managers have deemed bear bagging ineffective and made it illegal. Product failure Yellow-Yellow, a wild 125-pound black bear in the Adirondacks near North Elba, New York, figured out how to open several models of polypropylene and polycarbonate bear canisters. Yellow-Yellow was killed by a hunter in the fall of 2012. References External links List of containers approved in the Sierras from sierrawild.gov Hiking equipment Bears Bags Camping equipment Food storage containers Survival skills Food storage Appalachiantrail.org/bears