• 4 Videos, Slides, Films

• 4 Animals
• 3 Ecology
• 3 Natural history
• 2 Desert ecology
• 1 Biotic communities
• 1 Caves
• 1 Deserts
• 1 Forests and forestry
• 1 Habitat (Ecology)
• 1 Jungles
• 1 Tropics

• 4 Attenborough, David, 1926-
• 4 British Broadcasting Corporation
• 4 Discovery Channel (Firm)
• 4 Fothergill, Alastair
• 4 Nihon Hōsō Kyōkai
• 3 BBC Worldwide Americas, Inc.
• 1 Allen, Penny
• 1 BBC Worldwide Americas, Inc
• 1 Berlowitz, Vanessa
• 1 Brownlow, Mark
• 1 Byatt, Andrew
• 1 Canadian Broadcasting Corporation
• 1 Keeling, Jonny
• 1 Linfield, Mark
• 1 Warner Home Video (Firm)

• 4 English

• 1 Cold regions
• 1 Eastern Hemisphere
• 1 Northern Hemisphere
• 1 Southern Hemisphere
• 1 Tropics
• 1 Western Hemisphere

• 3 Nature television programs
• 3 Science television programs
• 1 Documentary
• 1 Television mini-series
• 1 Television programs
• 1 Television special
• 1 Video recordings for the hearing impaired

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