A fauna nature reserve established in the Stoczek commune, Stoczek forest district, Łochów forest district. The reserve is located within the Nadbużański Landscape Park. The purpose of protection is to preserve breeding sites of rare and endangered bird species and a rich group of birds in terms of the number of species for scientific and educational reasons. The presence of 66 species of birds has been recorded in the reserve, including 48 breeding species, such as: little grebe, common reed bunting, water hen, mallard, black stork, solitary sandpiper, tufted duck, common teal and marsh harrier.