AVIFAUNA Meaning of AVIFAUNA in English [ 'eɪvɪfɔ:nə ]■ noun Zoology the birds of a particular region, habitat, or geological period.Derivatives~l adjective OriginC19: from L. avis 'bird' + fauna . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004