The desert hedgehog is one of the smallest of hedgehogs. It is 5.5 to 11 inches long and weighs about 10-18 ounces. The spines on its back can be banded with coloring similar to the four-toed hedgehog. If desert hedgehogs are threatened, their muscles go tight and pull the outer layer of skin around the body, making their spikes stick out in all directions. As such it almost impossible to get to them.