What does fauna mean?
Fauna refers to all the animal life found in a particular place, habitat, or period of history, viewed collectively rather than individually. Ecologists might speak of the fauna of a coral reef, while paleontologists describe the fauna of the Pleistocene epoch. The word carries a formal, scientific register: it appears frequently in environmental reports, conservation law, and nature writing, usually alongside its companion term flora, which covers plant life in the same way. Beyond this dominant sense, fauna can also denote a published survey or catalogue of the animals of a region. Derived ultimately from Faunus, the ancient Roman deity associated with the countryside and wild creatures, the word entered English usage in the seventeenth century. Understanding fauna is useful not only for reading scientific literature but also for grasping the language of conservation debates, where protecting native fauna is a recurring concern across national parks, wildlife reserves, and international treaties alike.
The animals of a specified region, habitat, or geological period, considered as a whole.
"The Galápagos fauna famously inspired Darwin's theory of evolution."
Usually treated as a singular mass noun; the plural 'faunas' occurs mainly in scholarly writing.
A written work cataloguing and describing the animal species of a particular area or era.
"She consulted a nineteenth-century fauna of Scandinavian birds for her research."
The plural is rare and almost entirely restricted to scientific or academic contexts, typically when comparing the animal life of different regions or time periods.
"The study compared the faunas of temperate and tropical estuaries."
Fauna is named after Faunus, the Roman god of the countryside and wild animals — so every time you say 'fauna', you're invoking an ancient Roman deity of the woods.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of fauna
Fauna derives from New Latin, where it was used in scientific taxonomy as a collective name for the animal life of a region, modelled on earlier botanical usage. Its ultimate source is Latin Faunus, the rural god of Roman mythology associated with flocks, fields, and wild places, whose attendant spirits were the fauni — cognate with the English words faun and faunal. The word entered English in the seventeenth century as naturalists began systematising descriptions of regional animal life.
Related word forms
How fauna is actually used
Fauna is a mass noun in its primary sense and typically appears in formal, scientific, or environmental writing rather than everyday conversation. It is most often paired with flora ('flora and fauna'), a fixed phrase common in ecological, legal, and conservation contexts. The plural 'faunas' exists for referring to the animal life of multiple regions or periods, but is largely confined to academic prose.
Easily confused with fauna
Fauna refers to the animal life of a region, while flora refers to its plant life — the two are often mentioned together.