Abstract: By using the methods of fixed-spot observation, GPS positioning, sampling plot investigation, and factor analysis, the forage habitat selection of white-naped crane (Grus vipio) during its incubation period in Zhalong Wetland was studied f rom April to May 2002〖KG-*2〗-〖KG-*7〗2008. In the study area, the crane durin g its incubation period chose a variety of habitat types as its forage habitat, among which, wetland (reed swamp) was the main one, occupying 7436% of the tot al, followed by farmland. The forage habitat included four elements, i.e., habit at identification, food, water, and cover, and the main selection criteria were the identification factor and energy factor, followed by eating feasibility fact or, security distance factor, and concealment factor. The forage habitat selecti on of the crane during its incubation period had two levels (macro- and microha bitat) and three courses (forage habitat type choice, forage area choice, and fo rage microhabitat choice).

Key words: medicinal plant, bacterial diversity, culture-independent, LH-PCR