Abstract: An investigation was conducted on the pollination insect species, their flower-visiting behaviors, and diurnal activity rhythm on endangered plant Amygdalus pedunculata. A total of 21 visiting insect species belonging to 5 orders, 17 families, and 19 genera were recorded, among which, 15 species belonging to 3 orders, 11 families, and 13 genera were pollination insects. Anthophora melanognatha, Bombus patagiatus, Bombylius major, Syrphus ribesii and Halictus rubicundus were the main pollination insects. Their diurnal activity rhythms had greater difference, and their activity’s peaks staggered each other. Among the main pollination insects, A. melanognatha had the characters of large body size, short residence time, and carrying large amount of pollen, being the most efficient pollination insect on A. pedunculata, and thereby, the study of its biology and pollination ecology should be strengthened in future.

Key words: Emergy analysis, Energy analysis, Ecosystem, Solar emergy, Solar transformity