 Years of cataloging by biologists and park rangers have recorded 2000 species of insect , 8 reptiles , 169 birds , 48 mammals , and even one amphibian ( the western toad ) . Birds and some rodents are seen most frequently in the Craters of the Moon area . Brown bears once roamed this area but have long ago become locally extinct . Traditional livestock grazing continues within the grass / shrublands administered by the BLM . 
