Rreth 50% te llojshmerisë se bimesisë se Shqiperisë, ose 14% e asaj Evropiane gjendet ne Theth
The fauna of Park is rich and diverse. There can be found about 20 species of mammals, 50 nesting species s nearly 10 species of reptiles and 8 species of amphibians. Very interesting is the presence of mammals and birds which are very related with habitat of high forests and the ecosystem of alpine mountains Among the largest mammals of the park are: brown bear (Ursus arctos), wolf (Canis lupus), lynx (Lynix lynix), selvage goat (Rubicapra ribicapra) and roe (Capreolus capreolus), etc..
In higher forest among the birds largely dominate Fragillidae family members (4 types), and Paridae (4 species). Other components are rarer typical elements of high forest as woodpeckers (3 types), reptle of trees (Sitt europea), etc..
On the ground floor other types of shrubs can be found like (Erithacus rubecula), ouzel (Turdus merula), (Lanus collurio), etc.. General condition of habitats is relatively good.