182 vertebrate species are registered within the reserve and on the adjacent areas (birds Aves - 106, mammals Mammalia - 47, fishes Pisces - 12, amphibians Amphibia - 10, reptiles Reptilia - 6, cyclostomatous Cyclostomata - 1). 33 of them are listed to the Red Book of Ukraine.

Almost not converted habitats of the most fragile species have preserved here: red deer (Cervus elaphus), chamois  (Capreolus capreolus), brown bear  (Ursus arctor), wolf (Canis lupus) etc. An invertebrate fauna of the reserve is very diverse (over 1000 species), among which insects are the most numerous group. There are registered: 25 Ephemeroptera, 126 Aphidinea, 116 Carabidae, 14 Bombini, 87 Trichoptera etc. An animal world is closely bound to the altitudinal belts that are why its great share is composed of the species characteristic for coniferous forests. The following taiga species are found here: Lynx lynx, Strix uralensis, Dryocopus martius, Pyrrhula pyrrhula, and also the animal species chatacteristic for broadleaved forests: Turdus merula, Dendrocopos major, Dendrocopos minor, Picus canus, Muscicapa parva,  Coccothraustes coccothraustes, Columba oenas, Muscardinus avellanarius, Felis silvestris, Salamandra salamandra. Only snow vole  (Chionomys nivalis) and Alpine accentor  (Prunella collaris) are ecologically bound to the subalpine vegetation zone. Habitats of most of the species cover few altitudinal zones.

Carabus cancelatus

Among over 1000 species of invertebrate animals the most numerous group are insects  (Insecta). There are especially great numbers of moths. One can find here such beauties as  (Vanessa atalanta), European peacock (Inachis io), mourning cloak (Nymphalis antiopa), painted lady (Cynthia cardui), small elephant hawk-moth (Deilephila porcellus), which are rather common for this area. The red-listed old world swallowtail  (Papilio machaon), scrace swallowtail  (Iphiclides podalirius), small emperor moth  (Saturnia pavonia) are found here too. Among beetles one can notice here hermit beetle (Osmoderma eremita) and rosalia longihorn (Rosalia alpina). These all are thermophyllous species.Over 60  mollusks species are found at the reserve. The most characteristic invertebrate species are: land slug (Bielzia coerulans), six-spot brunet (Zygaena filipendule).12 invertebrates are listed to the Red Book of Ukraine. There are also numerous Carpathian endemic species: mollusks Mollusca – 9, ephmeron  Ephemeroptera – 4, ground beetles  Carabidae – 16, caddisflies Trichoptera – 87. Larvae of Perla maxima are developing in streams, and an adult insect can be observed on semi-aquatic plants. A butterfly yellow-spotted ringlet  (Erebia manto) dwells on forest meadows, though most of the moths are residents of the forest vegetation zone. Kentish glory (Endromis versicolora) flyes around in early spring; and a typical resident of beech forests – tau emperor (Aglia tau) – is observed in May, while in May-June a colored apollo (Parnassius mnemosyne) is found on forest glades.

Salamandra salamandra

The Gorgany mountain ridge has a specific complex of boreal-Taiga and mountain vertebrate species, which are not registered at the adjacent territories. 33 vertebrate species of the reserve and surroundings are listed to the Red Book of Ukraine (cyclostomatous – 1, fish – 1, amphibians – 4, reptiles – 1, birds – 14 and mammals – 12). Among them: Ukrainian brook lumpery (Eudontomyzon danfordi), grayling (Thymalus thymalus), fire salamander (Salamandra salamandra), Carpathian newt (Lissotriton montandoni), Alpine newt (Mesotriton alpestris), smooth snake (Coronella austriaca), black stork (Ciconia nigra), golden eagle  (Aquila chrysaetos), western capercaillie (Tetrao urogallus), Eurasian eagle-owl (Bubo bubo), alpine shrew (Sorex alpinus), montane water vole  (Arvicola scherman),  snow vole  (Chionomys nivalis),  brown bear  (Ursus arctos), ermine (Mustela erminea),  European mink (Mustela lutreola), otter (Lutra lutra), wild cat (Felis silvestris), lynx (Lynx lynx). Number of species protected by different conservation lists is much greater: 25 animal species are under special protection within the Bern Convention, 1 endangered species is protected by the Bonn Convention, 7 species are listed to the IUCN Red Book, and 4 animal species belong to the European Red List.  The Carpathian endemic species are: Carpathian newt (Lissotriton montandoni), Carpathian capercaillie  (Tetrao urogalus), the Carpathian subspecies of the Ural owl (Strix uralensis macroura) and some other.