Feng_CheCastaldo_2021_S5Files.zip

eBird data from the eBird Basic Dataset (May 2019 Update) and 50-stop data from the North American Breeding Bird Survey Dataset (BBS, version 2018.0) filtered to the US state of Massachusetts during the breeding seasons of 2005-2018. R-script covers the modeling methods and comparative analysis of four indices of annual relative abundance derived from these BBS and eBird datasets.