Tsimanampetsotsa is a birders paradise. More than 100 species are found here, including pink, greater and dwarf flamingos forming big colonies on the lake, 5 coua species, Archbold´snewtonia, Madagascar plover, red-shouldered vanga or Lafresnaye´svanga. Apart from birds, there are 12 species of mammals, among them the extremely rare and local endemic Grandidier´s mongoose and 4 lemur species: ring-tailed lemur, Verreaux´ssifaka, Gray-brown mouse lemur and white-footed sportive lemur.