• 3 Animals
• 2 Animal migration
• 2 Biotic communities
• 2 Floods
• 2 Habitat (Ecology)
• 2 Natural history
• 2 Polar bear
• 2 Salmon
• 2 Sardines
• 2 Whales
• 1 Adaptation (Biology)
• 1 Amphibians
• 1 Animal diversity
• 1 Aquatic ecology
• 1 Biodiversity
• 1 Birds
• 1 Coasts
• 1 Deep-sea animals
• 1 Desert ecology
• 1 Ecology
• 1 Elephants
• 1 Fishes
• 1 Forest ecology
• 1 Freshwater ecology
• 1 Insects

• 3 Attenborough, David, 1926-
• 2 BBC Earth (Firm)
• 2 Bass, Karen
• 2 Discovery Channel (Firm)
• 2 Warner Home Video (Firm)
• 1 Alberts, Jonathan
• 1 Allan, Douglas
• 1 American Movie Classics Company
• 1 Anderson, Justin
• 1 BBC Two (Television station : London, England)
• 1 BBC Worldwide Americas, Inc
• 1 Barton, Miles
• 1 Bassett, Peter
• 1 Berlowitz, Vanessa
• 1 Bolduc, Nicolas, 1973-
• 1 Brosnan, Pierce
• 1 Canadian Broadcasting Corporation
• 1 Courtenay, Tom
• 1 DeGruy, Michael, 1951-2012
• 1 Discovery Channel Canada
• 1 Farrell, Colin, 1976-
• 1 Fenton, George
• 1 Fothergill, Alastair
• 1 Graham, Stephen, 1973-

• 4 English
• 1 French

• 2 Alaska
• 2 Arctic Regions
• 2 Botswana
• 2 British Columbia
• 2 Okavango River Delta
• 2 Polar regions
• 2 Serengeti Plain
• 2 South Africa
• 2 Tanzania
• 1 Antarctica
• 1 Antárctica
• 1 Earth (Planet)
• 1 Great Plains
• 1 Kalahari Desert
• 1 Regiones Árticas
• 1 Tropics

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