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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 marine biologist and conservationist

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

American philanthropist

British travel writer, conservationist

American preservationist

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

Australian-American television personality, conservationist and zoo operator

American environmentalist

Swiss entomologist

South African conservationist

Naturalist, ornithologist, wildlife conservationist, taxonomist

American conservator

Teacher, historical preservationist, led drive to preserve The Alamo

New Zealand educator, botanist and conservationist

Heiress, preservationist, and descendent of the house of kawānanakoa

American conservationist

American conservation biologist

Austrian painter, pacifist and writer

Restauratore e storico dell'arte italiano

American architect

American-Australian zoologist, conservationist and television host

Belarusian artist

Dutch numismatist

British biologist and species conservator

Cat breeder

American conservationist