branch of biology that studies the members of the animal kingdom and animal life in general. It includes both the inquiry into individual animals and their constituent parts, even to the molecular level, and the inquiry into animal populations, entire faunas, and the relationships of animals to each other, to plants, and to the non-living environment.

http://id.loc.gov/authorities/subjects/sh85149983

Hanson, Earl Dorchester. "zoology". Encyclopedia Britannica, 3 Aug. 2026, https://www.britannica.com/science/zoology. Accessed 16 August 2026.