The site extends over a surface of 1524 hectares between the territories of Almese, Caselette, San Gillio, Val Della Torre and comprises entirely the Monte Musinè, lakes of Caselette and Lake Borgarino. the altimetric excursion, the coexistence of different types in the environment, the particularly mild climate, in addition to the presence of wetlands, guarantee the existence of a large number of animal and plant species (including several rare at regional and national level) making the site is one of the piedmont areas a greater biodiversity.
The Musinè represents a true oasis xerotermica wherein there are numerous species in mediterranean gravitation rare in the region and often with the northern limit of their distribution area. Biotic elements equally important are the fauna and the flora of wetlands, which include some species in strong regression or at risk of disappearance in Piedmont. As regards fauna, it should be pointed out that in the regional context perhaps no other biotope hosts such a high number of protected species which are well 30.
The Monte Musinè plays a particular interest for the nesting of thermophilic species, predominantly Mediterranean gravitation, as the occhiocotto (Sylvia melanocephala), the sterpazzolina (Sylvia cantillans), the horn owl (Otus scops), the succiacapre (Caprimulgus europaeus), the harrier eagle (Circaëtus gallicus), zigolo black (Emberiza cirlus). About fifty species is more or less closely linked to the aquatic environments and is therefore seen primarily or exclusively at the Lakes Borgarino and less of Caselette; these basins of substantial importance especially in the period of the step, while host a limited number of aquatic species nesting and wintering birds because of their small size and the ease with which the surface of the water gelain winter. Among the species of step reported they remember the pilgrim hawk (Falco peregrinus) and the honey buzzard (pernis apivorus); between the migratory wintering and the cormorant,the Fisher Hawk, the bittern, the little bittern, the Hen Harrier.
In the area are reported some species of mammals medium-large, while almost completely lack data relating to small mammals and the bats. The herpetofauna is particularly rich in species, including particular is the coexistence of three species of newts: The alpine newt, no longer reported in recent years, the Tritone dotted and the crested newt. Of importance are some observations of the European pond turtle union (Emys orbicularis), species which is very rare in the region and almost extinct in the province of Turin.
Finally plays particular importance is the presence of the single ortottero Piedmont Community interest, Saga pedo, rare in Italy and well known in Piedmont in few other stations. There is also the river crayfish (Austropotamobius pallipes), the only indigenous decapode living in Piedmont.