Robert S. Arbib Jr.

American industrial designer

British ornithologist

American naturalist, author and filmmaker

American ornithologist

American author, naturalist and conservation activist

American politician

Zoologist (1911-1996)

American ornithologist, botanist, naturalist, conservationist and author

American writer and scientist

American writer and scientist

Australian author, ornithologist and conservationist

British/ American author, artist, and a founder of the scouting movement

Welsh naturalist and author

Canadian-born American writer

American physicist

American ornithologist

American writer, critic, and naturalist

British scientist

American ornithologist

American writer

American writer

Canadian novelist

British naturalist

American naturalist and essayist

American photographer

Scouting author, Scoutmaster to the world

American businessman and amateur ornithologist

British historian

American conservationist

American artist

American Ornithologist

American university professor, zoologist, herpetologist, conservationist

American writer

Zoologist

American entomologist and mountaineer

British scientist

American speculative fiction writer and editor

British priest and naturalist

British conservationist

American children's illustrator and conservationist

South african Nobel-winning writer