A multi-isotopic (δ13C, δ15N, and δ34S) faunal baseline for Maya subsistence and migration studies

•Multi-isotope study assessed utility of sulfur isotope analysis in Maya archaeology.•Faunal δ13C and δ15N values consistent with previous studies.•Hypothesized variation of environmental δ34S value was generally confirmed.•Freshwater faunal and nonlocal individuals identifiable by their δ34S values.•A multi-isotopic approach and establishing local δ34S baseline values is essential.