North American black bears are the world's most adaptable large carnivores. They are intelligent, strong, and agile and eat almost anything, including human garbage. They tend to sleep during the day, and they feed in the early morning and late evening. Bears establish a home range covering 20 square miles for females and over 40 square miles for males. In northern climates, all female black bears and many male black bears hibernate. In warmer regions, depending on the availability of food, bears hibernate intermittently.