[N-COUNT-COLL 可数集合名词](尤指某个地区的)动物群 Animals, especially the animals in a particular area, can be referred to as fauna .
[TECHNICAL 术语]
...the flora and fauna of the African jungle...
非洲丛林的动植物
Brackish waters generally support only a small range of faunas.
咸水水域通常只能存活为数不多的几种动物。
Oxford
fauna/ˈfɔːnə; NAmEˈfɔːnə/noun[uncountable , countable ]all the animals living in an area or in a particular period of history (某地区或某时期的)动物群◆the local flora and fauna(= plants and animals)当地动植物群◆( technical 术语) land and marine faunas 陆地和海洋动物区系faunafaunasfaunaefauna/ˈfɔːnə; NAmEˈfɔːnə/