In addition, scaling issues may constrain the utility of some scientific approaches (Peterson and Parker 1998). For example, it may be infeasible to evaluate the response to vegetation manipulation of rare or wide-ranging species (e.g., masked bobwhite quail (Colinus virginianus ridgwayi), grizzly bear (Ursus arctos)). In contrast, common species with small home ranges (e.g, most small mammals) are abundant at relevant spatial and temporal scales and are, therefore, amenable to description and experimentation.