Birding Yancheng, Jiangsu
10,000 Birds
SEPTEMBER 6, 2022
It is not quite clear why they do this as it apparently does not affect breeding success. They have written a paper on the “Feasibility of counting breeding Pied Avocets and Black-winged Stilts using drones” It seems to work, actually – though about 20 percent of breeding pairs are being missed by drone surveys.
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