The article gives the definition of a notion «concept» and presents its main interpretations in modern linguistic science. This article also describes the notion of «phraseologicalworldview» and its relation to the notion «concept». Based on the selected phraseological units that actualize the concept FAUNA in three languages – English, Spanish and Ukrainian, their analysis, comparison and classification were carried out. This allowed us to prove that the language actualization of the concept FAUNA, which is based on the material of the English, Spanish and Ukrainian phraseological units, is associated with the identification of national characteristics of the researched cultures. The peculiarities of the phraseological worldview of a particular language are influenced by linguistic and cultural factors, geographical location, customs and traditions of the country. Together with the peculiarities of the world perception of British, Spanish and Ukrainian people, these factors influence the language organization, human traits, ideas and meanings that are embedded in the concepts of various animals. In the course of the research, the main different and common features of the language actualization of the concept FAUNA in English, Spanish and Ukrainian phraseological worldviews have been discovered.