RESULTS
The first discovery of Reed Parrotbill entering Smooth Cordgrass was at noon in November 2021, we heard the Reed Parrotbill chirping in Smooth Cordgrass. After we stopped moving and stood still for a while, we saw the Reed Parrotbill flocking and singing in Smooth Cordgrass (See Fig.2.). In the grass, there were many Reed Parrotbills jumping inside the Smooth Cordgrass, grasping the middle and upper parts of the Smooth Cordgrass, and moves horizontally along the Smooth Cordgrass. From November 2021 to March 2022, throughout the overwintering period, we investigated five times, and found that the Reed Parrotbill was active in Smooth Cordgrass each time (See Table.1.).
Table. 1. Investigation time and results