Abstract Forestry originated as a science under the need to manage forests for timber production in sustainable way. Since then, sustainability has been broadened include variety of values and services recognised important human well-being, while at maintaining relevant productive function. Hence, silviculture exists humankind not their continued existence. Sustainability is obtained by adoptin...

cockaded woodpeckers fit most of the characteristics PECKERS used to describe nuclear members of foraging flocks, such' as conspicuous plumage and vocalization. They RICHARD R. SCHAEFER, Wildlife Habitat and aIso appear to be joined and foilowed more often than Silviculture Laboratory, Southern Research Station, they themselves join and follow other species. interest of researchers. Questions r...