Most of the species registered in the area of SRN Slano Kopovo belong to a group of protected and strictly protected species. As such they are protected by law. There are 25 species of teriofauna that belong to Insectivora, Lagomorpha, Rodentia, Carnivora and Artiodactyla orders. In the saltiest part of the marsh live Sorex araneus, Sorex minutus, Talpa europaea, Erinaceus concolor, Microtus arvalis, Ondatra zibethica, Apodemus microps, Vulpes vulpes, Mustela nivalis. Arvicola terrestris, Pitymys subterraneus live in Small Kopovo. There are Cricetus cricetus, Apodemus sylvaticus, Mus musculus, Apodemus agrarius in some areas. In the southern field lives the population of squirrels – Spermophilus citellus. in the entire area live Lepus europaeus, Mustela nivalis, Mustela putorius, Vulpes vulpes i Capreolus capreolus.