States the evidence for a theory of evolution, explains how evolution takes place, and discusses instinct, hybridism, fossils, distribution, and classification, in a volume that includes explanatory notes and background information.

Few books have had a greater impact than A Sand County Almanac, which many credit with launching a revolution in land management. Written as a series of sketches based principally upon the flora and fauna in a rural part of Wisconsin, the book, originally published by Oxford in 1949, gathers informal pieces written by Leopold over a forty-year period as he traveled through the woodlands of Wisconsin, Iowa, Arizona, Sonora, Oregon, Manitoba, and elsewhere;...