Bjelasica mountain, together with the Biogradska Gora National Park , is a unique environmental entity, a natural resource of exceptional importance, one of the centers of biological diversity of the Balkan’s peninsula and beyond.

The largest forest area is within the valley of Biogradska river, inside the National Park. The slopes and valleys turned to the north seem like they are scattered with dark “patches” of bog pine or dwarf pine, following beech trees and conifers. The bog pine is nature’s rarity and a true decoration of Bjelasica. It is especially true in the places where it is intertwined with green cress. Mountain curved beech and bog pine, i.e., their dark color is accountable for the names of the peaks they cover (Black head, Black peak). Bog pine is protected species and it is forbidden to cut it or burn it.

Numerous endemic and rare species have a national protection status: Greek maple (Balkan endemic species), Macedonian pine  – endemic species of the Dinaric Alps (near Ursulovačko lake); Yew – (in Medjedak – Zejnilove rupe, Jezerine – Vranjak); Allium brulloi – wild onion – Balkan endemic species (near Šiško Lake); Great yellow gentian, the Spotted Gentian – (on the silicates of Troglava, Zekova glava, Lalevića valleys, Bjelila); Red bladder-senna – Balkan endemic species (inside cracks in the limestone rocks of the subalpine belt); Black Poplar- (Otaševo lice and some other smaller localities); Daphne – Balkan endemic species (in the rainforest reserve, Strmenica, Struga, Kriješteli holes); Queen -of-the -Alps; Balkan butterwort (rare insectivorous and endangered species, inhabits wetlands along springs and streams); Narthecium- Balkan endemic and glacial relict (silicate habitats on peat bogs along springs and streams); lily-of-the-valley bellflower – (as a subspecies of Montenegrina it is mentioned for Bjelasica: around springs and streams, as well as on the edges of mesophilic forests); Lakušić’s carnation – (Lalovića valleys); Potentilla montenegrina- Balkan endemic species; Verbascum durmitoreum- Montenegrin endemic species (Zekova glava); Valeriana Pancicii – Montenegrin endemic species (inside rock cracks); Viola orphanidis ssp. nicolai, Nikola’s violet – endemic species of the Dinaric Alps (Jelovica). The rich flora contains a large number of medicinal, melliferous, aromatic, edible and other economically important species.

So far, 47 species of mammals have been recorded on Bjelasica. Among them are: hedgehog, several species of moles and shrews, 13 species of bats, two of which are the only ones recorded here. Then there are some squirrels, edible dormouse and forest dormouse, rabbit, wild boar, deer and roe deer. Carnivores recorded are wolf, fox, brown bear, yellow-throated marten, white breasted marten, ermine – great weasel, weasel, ferret, otter, badger and wild cat.

Numerous species of amphibians and reptiles can also be seen, many of which are protected. Insect fauna consists of as many as 350 species, many of which are endemic. 80 species of butterflies were observed, as well as autochthonous species of fish.

Bjelasica has a significant and preserved habitats of forest and mountain birds. Among more than 200 species of birds, the golden eagle, Common swift, the raven, the yellow-billed chough, the alpine accentor, the little owl, Alauda, the horned lark, the wood grouse, the great spotted woodpecker, the spotted nutcracker, and the ring ouzel can be seen. There are also some representatives of deciduous forests that are recorded here: the northern goshawk, the tawny owl, the song thrush, the great tit and many others.