Of all 27 habitat types in the Nature Park, 11 are included in the Council Directive 92/43/EEC on the conservation of natural habitats and of wild fauna and flora. The park preserves some of the Bulgarian rare plant communities – White Oak communities and these mixed with Common Hornbeam at law attitude, the communities of Chara algae found in one of the lakes, steppe vegetation on the white calciferous rocks. The Silver Lime forests are endemic for the Balkan Peninsula.
In the Nature Park occur 19 plant species with different conservation status.
Plants listed in the Red Book of Bulgaria – 1 Threatened species – White snowdrop (Galanthus nivalis), and 8 Rare species – Violet limodore (Limodorum abortivum), Caucasian Common Primrose (Primula vulgaris L. ssp. sibthorpii) and Bithynian Squill (Scilla bithynica), etc.
Protected are 17 plants; among them are Wormood (Artemisia lerchiana), Ephedra (Ephedra distachya), White Snowdrop (Galanthus nivalis), Violet Limodore (Limodorum abortivum), Caucasian Primrose (Primula vulgaris L. ssp. sibthorpii), and Bythinian Squill (Scilla bithynica).
In the Council Directive 92/43/EEC is included only one plant – White snowdrop (Galanthus nivalis), and 7 species are listed in CITES – all orchids in the Park ant the White Snowdrop.
50 species and varieties of algae occur in the small freshwater lakes of the park.
There are 3 moss species from the Park that are in the Red Book of Mosses in Bulgaria:1 Near Threatened – Orthotrichum pumilum and 2 Vulnerable species – Rhynchostegiella tenella, Taxiphyllum wissgrillii.
In the Zlatni Pyasatsi Nature Park 5 species of Macrofungi are listed in the Red List of Fungi in Bulgaria – Boletus armeniacus Quél. and B. pulverulentus Opat. are Endangered; Clathrus ruber and Hericium coralloides – Near Threatened and Gyrodon lividus – Critically Endangered.
The total number of invertebrate animal species with conservation status is 44. Of the invertebrate animals in the park 6 species have world importance (listed in the IUCN lists) – Osmoderma eremita, Cerambyx cerdo, Lycaena dispar, etc.
From the taxa with European importance prevail the Bulgarian endemics (14 species) – Zebrina varnensis, Cicindela hybrida rumelica, Larinus bulgaricus, etc. and Bulgarian endemics (12 species) – Bulgarica varnensis, Metrioptera oblongicollis, Argoptochus markovensis, etc.; 7 species are on lists under the Bern Convention – Hirudo medicinalis, Helix pomatia, Lucanus cervus, etc.; 6 species are in the Council Directive 92/43/EEC – Lucanus cervus, Osmoderma eremita, Lycaena dispar, др.; 8 species are CORINE species – Helix pomatia, Calosoma sycophanta, Morimus funereus, etc.
On national level important are the preglacial relics (4 species) and 4 protected species – Hirudo medicinalis, Helix lucorum, Helix pomatia and Lucanus cervus.
There are 3 species of butterflies with conservatin status – Lycaena dispar, Scolitantides orion и Melitaea trivia.
All the 11 species of amphibians in the park are protected in Bulgaria. The Eastern Spadefoot Toad
(Pelobates syriacus) is an endangered species, listed in the Red Book of Bulgaria. The Common Tree Frog (Hyla arborea) is a potentially endangered species.
10 species of the reptiles in the Park are protected – Hermann’s Tortoise (Testudo hermanni boettgeri), Common Tortoise (Testudo graeca ibera), European Pond Turtle (Emys orbicularis), Caspian Whip Snake (Coluber caspius), Aesculapian Snake (Zamenis longissima), etc. Threatened of extinction according to Bulgarian Red Book are 2 species – Aesculapian Snake (Zamenis longissima) and European Glass Lizard (Pseudopus apodus). The two tortoise species are in the list of CITES. According to the IUCN Red List the Common Tortoise is a Vulnerable species, Hermann’s Tortoise and European Pond Turtle are Near Threatened.
Of the small mammals in the Nature Park 7 species are protected in Bulgaria – European Hedgehog (Erinaceus concolor), Forest Dormouse (Dryomys nitedula), Hazel Dormouse (Muscardinus avellanarius), etc. Three of the species (the Hamsters) are Rare, listed in the Red Book of Bulgaria. Twelve species of the small mammals are protected under the Bern Convention – Eurasian Shrew (Sorex araneus), Lesser White-toothed Shrew (Crocidura suaveolens), Red Squirrel (Sciurus vulgaris), etc.
From the bigger mammals 4 species are protected – European Pine Marten (Martes мartes), Weasel (Mustela nivalis), Siberian polecat (Mustela eversmanni) and European Marbled Polecat (Vormela peregusna). In the Red Book of Bulgaria are 3 species (European Pine Marten Siberian polecat and European Marbled Polecat).
The Wild Cat (Felis silvestris) is listed in the CITES.
All 12 bat species that occur in the Nature Park are protected under the Bulgarian legislation and many international conventions Bulgaria has ratified. All the species from genus Pipistrellus are protected under CITES.
The artificial galleries in the park may be considered as an Important Bat Underground Habitat in Bulgaria with a national importance.
The breeding birds in the park are 86 species, of which 72 are protected by the Bulgarian Law of Biodiversity. The park’s location on the Via Pontica is a precondition for the observation of 32 more species at the time of migration. 45 of the bird species in the park are included in the Council Directive 79/409/EEC on the conservation of wild birds. 20 bird species are listed in the Red Book of Bulgaria. Some of the birds with conservation status are: козодой (Caprimulgus europaeus), Eagle Owl (Bubo bubo), European Roller (Coracias garrulus), Red-backed Shrike (Lanius collurio), Tawny Pipit (Anthus campestris), Semi-collared Flycatcher (Ficedula semitorquata), Olive-tree Warbler (Hippolais olivetorum), Barred Warbler (Sylvia nisoria), Pied Wheatear (Oenante pleschanka) and Ortolan Bunting (Emberiza hortulana).
