Location;"Sample No.";"Primer name";"Target gene";"Target animals";"Sequence length (bp)";"Prey items (taxon No. were identified to species level)";References China;98;12SV5F/12SV5R;"12S rRNA";Vertebrate;"~ 100";"20 (13)";"Present study" "Taiwan, China";64;"BirdF1/ BirdRM";"CO I";Birds;650;"16 (14)";"Jang-Liaw et al. (2021)" VF1/VRM;"CO I";"Mammals, reptiles, fish, amphibians, and some insects";650;; chmf4/chmr4;"CO I";Amphibians;650;; "FF2d/ FR1d";"CO I";Fishes;650;; "FishF1/ FishR1";"CO I";Fishes;650;; "FishF2/ FishR2";"CO I";Fishes;650;; "LCO1490/ HCO2198";"CO I";"Various phyla from the animal kingdom";650;; "LepF1/ LepR1";"CO I";Lepidoptera;650;; "Til9020F/ TilMR";COIII;Tilapia;254–548;; Denmark;212;12SV5F/12SV5R;"12S rRNA";Vertebrate;"~ 100";"35 (27)";"Pertoldi et al. (2021)" Italy;49;16Smam_1/16Smam_2;"16S rRNA";Vertebrate;140;"21 (12)";"Buglione et al. (2020)" England;171;12SV5F/12SV5R;"12S rRNA";Vertebrate;"~ 100";"37 (32)";"Harper et al. (2020)" Italy;50;1391F/1795R;"18S rRNA";"Vertebrates and Decapoda";160–170;"4 (1)";"Marcolin et al. (2020)" Spain;50;Teleo-12SF/Teleo-12SR;"12S rRNA";Fish;418–636;"7 (7)";"Martínez-Abraín et al. (2020)" "South Korea";7;12SV5F/12SV5R;"12S rRNA";Vertebrate;"~ 100";"28 (17)";"Kumari et al. (2019)" "VF2/FishF2/ FishR2/FR1d";"CO I";Fish;"~ 631";; 16SMAVF/16SMAVR;"16S rRNA";Invertebrate;~36;; "South Korea";24;MT0698L/MT1076H;"12S rRNA";Vertebrate;400;"76 (34)";"Hong et al. (2019)"