 The Saimaa ringed seal "Pusa hispida saimensis" is an endemic subspecies restricted to Lake Saimaa.In 2015 assessment of endangered Finnish bird and mammal species, mammal species classified as threatened included the Natterer's bat "Myotis nattereri" (endangered), the Nathusius’ pipistrelle "Pipistrellus nathusi" (Vulnerable), the arctic fox "Vulpes lagopus" (Critically endangered), the Gray wolf "Canis lupus" (endangered), the wolverine Gulo gulo (endangered), the European polecat "Mustela putorius" (Vulnerable) and the Saimaa ringed seal "Pusa hispida saimensis" (endangered).Over 20000 species of insects have been identified in Finland.