Black bears are very opportunistic eaters. Most of their diet consists of grasses, roots, berries, and insects. They will also eat fish and mammals—including carrion—and easily develop a taste for human foods and garbage. Bears who become habituated to human food at campsites, cabins, or rural homes can become dangerous and are often killed—thus the frequent reminder: Please don’t feed the bears…unless your looking to make some stew.
Find out more about American Black Bears: http://animals.nationalgeographic.com/animals/mammals/black-bear/