PBS
Pbs: Nova: Bear Essentials of Hibernation
The hibernation of bears is described in detail. Information about the actions of bears leading up to hibernation, the physiological changes that bears experience during hibernation and the 'waking up' process are given. General black...
Smithsonian Institution
National Museum of Natural History: American Mammals: American Black Bear
Most Black Bears hibernate for up to seven months, and do not eat, drink, urinate, or exercise the entire time. In the South, where plant food is available all year, not all bears hibernate, but pregnant females do. Learn more about the...
PBS
Nova Online: Japan's Secret Garden
Explore a year in the life of the people and wildlife around Lake Biwa in Japan. Study hibernation, rice cultivation, and the metamorphosis of insects in the area.