Because of its focus of feeding on conifer seeds,the Red Crossbill(Loxia curvirostra) is one of the ideal species to study the coevolution between seed-prey animals and plants,and its coevolution to conifers has attracted much attention.We carried out investigation on the Red Crossbill ’s adaptation to conifers at Lianhuashan throughout the morphological differences and food profitability.These crossbills at Lianhuashan,with the spruce Picea crassifolia as their key conifer,are totally smaller than those in North America,both on body size and bill size,and their smaller bills adapted to the smaller seeds of the spruce trees.