Surveys was conducted to study the population density and habitat utilization of the ibex ( Capra ibex
) in Tomur National Nature Reserve during October-December 2005. The results are as follows: (1) The mean group size of the ibex in Tomur Nature Reserve is 8.43 and the population density is 269.76/100 km2
; (2) The ibex prefer areas with steep slope (between 30°-45°), broken substrates and cliffs nearby (<100 m). They avoid grasslands and flat hillsides; (3) The probable reason for this habitat selection is self-protection.