Bird data

Total number of individuals of each bird species recorded along each 250-m transect per year. Rowname - row identification including the transect code and the bird census year. Transect - transect code; Farmland_area - low- or high-intensity farmland area; Year - bird census year; Date - bird census date; Recorder - recorder's name.本数据集记录了每年沿每条250米样线开展鸟类普查时，各鸟类物种的个体总数量。行标识（Rowname）：包含样线代码与鸟类普查年份的行识别信息；样线（Transect）：样线代码；农田面积（Farmland_area）：低强度或高强度农田区域；调查年份（Year）：鸟类普查年份；调查日期（Date）：鸟类普查日期；记录员（Recorder）：调查记录者姓名。