Population, distribution and home range of wintering bar-headed goose along Yaluzangbu River, Tibet Diurnal activity patterns and environmental factors on behaviors of Bar-headed Geese Anser indicus wintering at Caohai Lake of Guizhou, China The Effect of Sample Pretreatment on Stable Carbon and Nitrogen Isotope Ratios of Bar-headed Goose Tissues Foraging Habitat Selection of Bar-Headed Goose in Winter at Caohai National Reserve in Guizhou Movement and habitat utilization of breeding Bar-headed Goose and the relationship with humans in Qinghai Lake