• 7 Videos, Slides, Films

• 6 DVDs
• 1 Blu-ray Discs

• 3 Polar bear
• 2 Animal migration
• 2 Animals
• 2 Biotic communities
• 2 Brown bear
• 2 Floods
• 2 Habitat (Ecology)
• 2 Research
• 2 Salmon
• 2 Sardines
• 2 Whales
• 1 Adaptation (Biology)
• 1 Alaska Earthquake, Alaska, 1964
• 1 Altitude, Influence of
• 1 Amphibians
• 1 Animal diversity
• 1 Aquatic ecology
• 1 Bears
• 1 Biodiversity
• 1 Birds
• 1 Black bear
• 1 Civil engineering
• 1 Climatic changes
• 1 Coasts
• 1 Deep-sea animals

• 3 PBS Distribution (Firm)
• 2 Attenborough, David, 1926-
• 2 Bass, Karen
• 2 British Broadcasting Corporation
• 2 Discovery Channel (Firm)
• 2 Morgan, Chris, 1968-
• 1 Alda, Alan, 1936-
• 1 Allan, Douglas
• 1 Anderson, Justin
• 1 Angier, John
• 1 BBC Earth (Firm)
• 1 BBC Worldwide Americas, Inc
• 1 Bassett, Peter
• 1 Brosnan, Pierce
• 1 Chedd-Angier Production Company
• 1 Cinquième (Firm)
• 1 Clark, Liesl
• 1 Connecticut Public Television
• 1 DeGruy, Michael, 1951-2012
• 1 Fothergill, Alastair
• 1 Gedeon Programmes
• 1 Glassman, Gary
• 1 Great Projects Film Company
• 1 Hess, Janet
• 1 Holmes, Martha, 1961-

• 7 English

• 2 Arctic regions
• 2 Botswana
• 2 British Columbia
• 2 Okavango River Delta
• 2 Serengeti Plain
• 2 South Africa
• 2 Tanzania
• 1 Alaska Highway
• 1 Denali National Park and Preserve (Alaska)
• 1 Denali, Mount
• 1 Denali, Mount (Alaska)
• 1 Earth (Planet)
• 1 Great Plains
• 1 Kalahari Desert
• 1 Polar regions
• 1 Tongass National Forest (Alaska)
• 1 Tropics

• 5 Nature television programs
• 4 Wildlife television programs
• 3 Video recordings for people with visual disabilities
• 2 Nonfiction television programs
• 2 Science television programs
• 1 Educational television programs
• 1 Observations
• 1 Television series

Limit year range