biologist, life scientist - (biology) a scientist who studies living organisms

bug-hunter, bugologist, entomologist - a zoologist who studies insects

ethologist - a zoologist who studies the behavior of animals in their natural habitats

herpetologist - a zoologist who studies reptiles and amphibians

ichthyologist - a zoologist who studies fishes

bird watcher, ornithologist - a zoologist who studies birds

protozoologist - a zoologist who studies protozoans

Karl von Frisch, Frisch - Austrian zoologist noted for his studies of honeybees (1886-1982)

Goodall, Jane Goodall - English zoologist noted for her studies of chimpanzees in the wild (born in 1934)

Alfred Charles Kinsey, Kinsey - United States zoologist best known for his interview studies of sexual behavior (1894-1956)

Konrad Lorenz, Konrad Zacharias Lorenz, Lorenz - Austrian zoologist who studied the behavior of birds and emphasized the importance of innate as opposed to learned behaviors (1903-1989)

Nikolaas Tinbergen, Tinbergen - Dutch zoologist who showed that much animal behavior is innate and stereotyped (1907-1988)