The requirements of wild animals for food, water, cover and living space have long been the basis of studies of wildlife habitat - probably even before the appearance of Leopold's text on wildlife management in 1993. Habitat mapping is essentially efforts to relate such seemingly axiomatic truths to mapped bases. Finding common denominators of habitat of mountain sheep and mountain beaver, two species with restricted distributions; as well as with white-tailed deer and robins both of which range from human settled valleys to remote alpine habitat. Once such a comprehensive habitat framework is devised, a classification system is needed to map it. Biophysical Inventory is an ecological mapping system developed for all species but has been applied to a limited number of species for several years. Recently there has been increasing use of the system to varied species including cattle, plants and insects. It appears the system is suitable for all species for which there is an understanding of habitat requirements.
B. A. Pendergast. 1111. Biophysical Inventory An Historical Perspective