The black bear used to be one of the most commonly seen large animals
because in Yosemite and Sequoia national parks they lived off of garbage
and tourist handouts. This bear has learned to open car doors in
Yosemite, where damage to automobiles caused by bears runs into the tens
of thousands of dollars a year. Campaigns to bearproof all garbage
containers in wild areas have been difficult, because as one biologist
put it, "There is a considerable overlap between the intelligence levels
of the smartest bears and the dumbest tourists."