There is still quite a lot of life out there, but it is mostly very small. According to a wildlife census by an ecologist at the University of Illinois named V. E. Shelford, a typical ten-square-mile block of eastern American forest holds almost 300,000 mammals--220,000 mice and other small rodents, 63,500 squirrels and chipmunks, 470 deer, 30 foxes, and 5 black bears.