Fauna
irds are the great asset of the Narew National Park. In the period 1979-1981, 179 species of birds were found, including 149 nesting species. The avian fauna is composed of common dominant species (sedge warbler, reed bunting, Savi's warbler, reed warbler, mallard) which constitute about 60% of the bird numbers, and a number of species representative for the valley and associated with boggy reeds (spotted crake, little crake, black tern, bittern, marsh harrier). The Narew valley meets the criteria for being included in the list of sites of both international and European importance for waterfowl. It is a nesting ground for over 1% of a European population of at least 10 species of birds, including bittern, garganey, marsh harrier, little crake, spotted crake, corn crake, great snipe, as well as a nesting ground for three globally threatened avian species - sea eagle, corn crake, and aquatic warbler.
Mammals are represented in the Park by 40 species. Among them there are small populations of elk and river otter, and a large population of beaver (260 animals). Water habitats are abundant in fish, in the variety of 22 species. 13 species of amphibians were also found in the Park.
