METHODS
The investigation site is located in a Spartina swamp (E120°29′50.00″;
N33°48′35.17″) near the south of Sheyang Port in Yancheng City, Jiangsu
Province. The area is bout 3.78km2, the perimeter is
about 11km (See Fig.1.). The first discovery of Reed Parrotbill entering
Smooth Cordgrass was at noon in November 2021. We accidentally heard the
chirping of the Reed Parrotbill.