* Biologist: This is a broad term for someone who studies living organisms, including both animals and plants.
* Zoologist: This is a biologist who specializes in the study of animals.
* Botanist: This is a biologist who specializes in the study of plants.
* Naturalist: This is a person who studies nature in a broad sense, often including both plants and animals.
* Ecologist: This is a scientist who studies the relationships between organisms and their environment, including both animals and plants.
The best term to use depends on the specific context. For example, if you're looking for someone to identify a specific plant, a botanist would be the best choice. If you're looking for someone to study the interactions between animals and their environment, an ecologist would be more appropriate.