Mammals are represented by beaver, otter, and elk. Beaver are ecologically particularly important as for example they dam up drainage ditches and thus create new wetlands. Among the nesting birds are (in pairs): 5 Arctic Loon, 10 Dunlin, 15 Osprey, 5 - 7 Bittern, 50 Crane, 1 - 2 Black Stork, 20 Common Kingfisher, 10 Spotted Crake and 100 Black Grouse. Nowhere else in Europe more couples of White Stork per square kilometres are nesting than in Lithuania.
The plant species diversity in the regional park Labanoras is very high. Botanists counted 120 different bushes of swamp willow, 300 flower stalks of bog gentian, 80,000 common spotted orchid, 2,300 water lobelia and 200 water-lily blossoms.