sequences of COI genes
0.2 to 0.5g of stomach contents from each sample were taken to extract DNA from the plateau forest frog. The target fragment of the extracted DNA was amplified by PCR. Primers PolyF (5-GGWACWGGWTGAACWGTWTAYCCYCC -3) and PolyR (5-TANACYTCNGGRTGNCCRAARAAYCA-3) were used to amplify the mitochondrial COI. Finally, the library was constructed using the TruSeq Nano DNA LT Library Prep Kit (Illumina, USA), followed by library quality control and quantification. Qualified libraries were sequenced using the NovaSeq 6000 SP Reagent Kit (Illumina, USA) with 2250bp paired-end sequencing.