Most nature elements and objects are three dimensional,but they are quite often expressed in two dimensions due to technical limitation.The study was to develop a three D-map of bird species in Nuozhadu Nature Reservation Zone with an digital elevation model and data of the vegetation and the bird species obtained from comprehensive science surveys for the nature reservation with aids of software like ArcView,ArcMap,ERDAS etc.The study helped to replace two-dimensional maps with three-dimensional ones,and b...