Dynamic Surveillance and Genetic Evolution of Coronaviruses in Overwintering Black-Headed Gulls (Chroicocephalus ridibundus) in Yunnan Province, China

The dataset consists of four Microsoft Excel files containing source data and processed summary data used to support the main prevalence and viral load analyses in the manuscript.The uploaded files include: 1) a summary file for BHG-CoV viral load data, including monthly viral load information for BHG-GCoV, BHG-DCoV, and total BHG-CoVs; 2) source data for Figure 2, showing the monthly prevalence of BHG-CoVs in overwintering black-headed gulls; 3) source data for Figure 3, showing the temporal trends in viral loads of BHG-GCoV and BHG-DCoV; and 4) source data for Figure 4, showing the distribution of total BHG-CoV viral loads among different sampling months.The files are provided in .xlsx format to support reproducibility of the prevalence calculations, viral load analyses, statistical summaries, and graphical results reported in the manuscript, while ensuring broad accessibility without the need for specialized software.