20th-century naturalists

Italian botanist and naturalist (1843-1920)

South African naturalist (1907–2004)

Mexican botanist, botanical collector, university teacher and director of the botanical garden at the National Autonomous University of Mexico (1901-2001)

German ornithologist and naturalist (1889-1972)

Austrian philosopher and inventor (1885–1958)

Spanish naturalist, environmentalist and documentary filmmaker (1928-1980)

Belgian naturalist and ornithologist

Soviet writer (1908-1994)

Swedish scientist (1884-1951)

Scottish-South African ornithologist (1917-2001)

New Zealand botanist (1935-1992)

British explorer and naturalist (1882-1962)

English zoologist and camouflage specialist (1900-1987)

Indian naturalist (1925-1994)

Canadian naturalist, author, artist and filmmaker (1929–1988)

South African herpetologist (1901–1975)

Swedish scientist

Last ruling Nawab of the princely state of Junagadh

Irish entomologist (1863-1951)

Indian arachnologist

British-Australian botanist and botanical illustrator (1912–1999)

American author and environmentalist (1883–1980)

British writer and hunter

Italian geologist (1897-1954)

Indian born New Zealand botanist, biologist and naturalist (1899-1980)

French speleologist and naturalist

Russian explorer (1872–1958)

Ecuadorian botanist, ecologist, university teacher and conservationist (1910-1994)

South African historian (1932-2006)

Spanish scientist (1897–1976)

Swedish lichenologist (1885–1964)

Canadian naturalist and photographer

Moravian rabbi

German botanist (1881-1970)

conservationist (1938–2004)