Animals, especially the animals in a particular area, can be referred to as fauna. the flora and fauna of the African jungle Brackish waters generally support only a small range of faunas. all the animals living in a particular area or period in history flora (Fauna wife or sister of Faunus; FAUN). All the species of animals found in a particular region, period, or special environment. Five faunal realms, based on terrestrial animal species, are generally recognized: Holarctic, including Nearactic (North America) and Paleartic (Eurasia and northern Africa); Paleotropical (tropical Africa and Southeast Asia); Neotropical (Central and South America); Australian; and Antarctic