 crayfish plague caused a population of European crayfish to disappear in 1984, subsequently replaced by signal crayfish introduced throughout the 1990s.In 1993 the population of amphibians included moor frog and common toad, of which only the later was found by 1996.The lake is an important stop-over for many bird species, including tufted duck, common goldeneye, and common merganser; and, more rarely, Slavonian grebe, and smew.