• 2 Steenbock Library
• 1 College Library

• 3 DVDs

• 34 Natural history
• 22 Ecology
• 21 Curiosities and wonders
• 18 Animal behavior
• 16 Habitat (Ecology)
• 9 Biotic communities
• 9 Physical geography
• 8 Biodiversity
• 6 Courtship in animals
• 6 Motion picture authorship
• 6 Sexual behavior in animals
• 4 Desert ecology
• 3 Deserts
• 3 Grasslands
• 3 Marine animals
• 3 Plants
• 2 Animal ecology
• 2 Animal migration
• 2 Butterflies
• 2 Climatic changes
• 2 Emperor penguin
• 2 Forests and forestry
• 2 Jungles
• 2 Lion

• 44 BBC Worldwide Ltd.
• 36 British Broadcasting Corporation
• 34 Discovery Channel (Firm)
• 33 BBC Worldwide Americas, Inc.
• 28 France télévision
• 21 Humble Bee Films
• 20 BBC Earth (Firm)
• 17 BBC America
• 17 British Broadcasting Corporation. Natural History Unit
• 12 Tencent Penguin Pictures
• 12 Zweites Deutsches Fernsehen
• 11 Jeffkins, Hilary
• 10 Fothergill, Alastair
• 9 Choudhury, Sharmila
• 9 Nihon Hōsō Kyōkai
• 7 Zhong yang dian shi tai (Beijing, China). Ji lu pin dao
• 6 Barrington, Rupert
• 6 Barton, Miles
• 6 Bass, Karen
• 6 Open University
• 6 Wanda Distribución de Films
• 5 Berlowitz, Vanessa
• 5 Silverback Films (Firm)
• 5 Tencent Pictures

• 14 Earth (Planet)
• 9 Antarctica
• 8 Arctic regions
• 8 Polar regions
• 5 Africa
• 1 Africa, Eastern
• 1 Alaska
• 1 Asia
• 1 Australia
• 1 Botswana
• 1 British Columbia
• 1 Cold regions
• 1 Congo River
• 1 Congo River Valley
• 1 Eastern Hemisphere
• 1 Europe
• 1 Everest, Mount (China and Nepal)
• 1 Himalaya Mountains
• 1 Kalahari Desert
• 1 Madagascar
• 1 North America
• 1 Northern Hemisphere
• 1 Okavango River Delta
• 1 Okavango River Delta (Botswana)
• 1 Sahara

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