The spontaneous fauna of this region belongs as well to the European Central Province with its two sub-provinces:
- softwood forests of Carpathian sub-province;
- hardwood forests of Pericarpathian sub-province.
Forests crossed by Uz River in the Oriental Carpathians are populated primarily with mammals. Among them, greater spread have the following: stag, bear, wolf, lynx, deer, wild boar, squirrel, and wild cat.
Among birds we can spot: grouse, blackbird, red crossbill, titmouse, hazel hen, turtle dove, starling, and woodpecker.
Of particular interest is the aquatic fauna comprising the native trout (Salmo trutta fario) met on Uz River, the chub and the barbell. The great fish value of Poiana Uzului Lake consists in populating it with a trout species attained from the crossing of native trout with rainbow trout. The hunting funds of The Forest District are of a high reliability, holding many specimens of great trophy value.