North American duck populations and the Central U.S. hunters who hunt them

This data file is in long format, comprising time series of hunter abundance and behavior and duck abundance. Hunter information varies by administrative flyway...本数据文件采用长格式（long format）存储，涵盖狩猎者丰度、行为特征以及鸭类丰度的时间序列数据。狩猎者相关信息随行政管辖迁飞通道（administrative flyway）的不同而存在差异……