The protection area is located in the area of influence of the Regional Park in the mostly flat part of the Reka River valley between the villages of Trpčane and Topolc. It has been designated as such mainly due to the corncrake (Crex crex), whose habitat includes humid and uncultivated meadows that are mowed late, i.e. in the second half of July. Extensive agriculture, the mosaic system of arable areas, humid meadows and overgrown areas significantly contribute to its preservation in the Reka River valley. In addition to the corncrake, several other important bird species (with regards to protection) inhabit this area; for instance, the little bittern, quail, screech owl, lesser grey shrike etc.

Part of the area of influence is located in the Snežnik–Pivka protection area. This area, covered with extensive Dinaric beech and fir forests that belong to the largest closed forest stands in Slovenia, is the habitat of many important species. In addition to the Ural owl, the following important species can be found here: the rock partridge, boreal owl, eagle owl, rock dove, wood grouse etc.