Abstract: The faeces of alpine musk deer (Moschus chrysogaster) were collected in the Helan Mountains, and the feeding habits of winter and spring were studied by the fecal microhistological analysis. The fecal and plant samples were collected from the habitats of alpine musk deer. The diet proportion of alpine musk deer in winter and spring was processed by frequency conversion method. The results showed that alpine musk deer’s diets in winter belonged to 30 species of 19 families, including 17.16% of Rosaceae, 16.64% of Caprifoliaceae, 15.64% of Fabaceae, 10.93% of Cyperaceae, being the main food of alpine musk deer in winter. Alpine musk deer’s diets in spring belonged to 31 species of 20 families, including 27.37% of Rosaceae, 13.28% of Salicaceae, 12.84% of Fabaceae, being the main food of alpine musk deer in spring. Among them,Astragalus chingianus was the main species common to winter and spring, accounting for 11.33% and 11.04% of spring and winter food, respectively. In addition, alpine musk deer also feed arbors, with food intake from 9.53% in winter to 18.67% in spring. Analyses of the food composition and diversity of alpine musk deer showed that Shannon diversity index, Shannon evenness index and niche width index were higher in winter than in spring.

Key words: species risk level., flight call, bird strike, nocturnal migration, migratory bird