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American politician, 26th President of the United States

Spouse of Queen Juliana of the Netherlands, prince-consort of the Netherlands

Scottish-American naturalist

American writer and conservationist

French naval officer, explorer, conservationist, filmmaker, innovator, scientist, photographer, author and researcher

American forester and politician

Naturalist, zookeeper, conservationist, author and television presenter

British travel writer, conservationist

American lawyer, eugenicist, and conservationist

New Zealand surgeon, photographer, explorer

British ornithologist

Australian zookeeper, conservationist and TV personality

American conservationist

British actor, writer, composer, musician, comedian, ornithologist, conservationist, television presenter

Conservationist, presenter, and writer

Associate Professor of Geography, University of Hong Kong, Hong Kong conservationist

Polish painter

American environmentalist

New Zealand writer and marine conservationist

American artist and activist

Swiss entomologist

South African conservationist

Naturalist, ornithologist, wildlife conservationist, taxonomist

Author, envrionmentalist and conservationist

American conservationist

American conservation biologist

Austrian painter, pacifist and writer

Restauratore e storico dell'arte italiano

American architect

Belarusian artist

American architectural historian

British biologist and species conservator

Kenyan zoologist

American historian

Activist for the protection of the social and industrial heritage of Brussels

International conservationist, environmentalist, explorer and author

Taiwanese conservationist

British-Australian horticulturalist