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Peter Mortimer examining a specimen in Swallow Cave, Kunming, China. Photo: World Agroforestry/Austin Smith

United statesYanzi dongPeter mortimerAustin smith peter mortimerXiangfu liuAustin smithChinese academy of sciencesThailand mae fah luang universityChinese academyWorld agroforestryMae fah luang universityNorth americaYunnan provinceSwallow caveSouth chinaLeave no trace