A fossilized footprint, burrow, or coprolite (fossil feces), are examples of trace fossils (ichnofossils). These trace fossils do not represent any physical part of an organism, but rather evidence of an organism's activity within its environment. Whereas a bone, leaf, or stem might provide enough information to positively identify a particular species, trace fossils rarely allow for such a precise identification. However, unlike fossilized body parts which can be affected by many variables, trace fossils are not often transported away and are usually found in the place where the organism lived. This advantage makes trace fossils in paleosols especially important because they allow for interpretation of the animal's behavior in its natural environment. A great example of this is the simple shallow fossilized burrows of solitary bees that make their homes in soil.