Habichtskauz
The area of the Vihorlat Mountains is of volcanic origin. Beech, oak, ash, maple, and fir trees are most common in Vihorlat. The area contains about 2,000 species of invertebrates and 100 species of birds. Notable species include Eurasian lynx, wildcat, gray wolf, otter, black stork, Ural owl, lesser spotted eagle, and Eurasian eagle-owl. A curiosity in the park is the Morské oko (literally 'Sea Eye') Lake.