Supplement 2. Count data on migrating woodlarks at Hanko bird observatory.

File List Woodlark_data.txt Description The file Woodlark_data.txt is a tab-delimited ASCII file, containing count data on migrating woodlarks at Hanko bird observatory, during autumns 2007–2009. The migration period considered ranges from 1st September (day-of-year 245) to 10th of November (day-of-year 315). The first row is a heading line. Column definitions: Column 1, title DOY. The time of migration season expressed as day-of-year, from 1st September (day 245) to 10th of November (day 315). Checksum for DOY = 19880. Column 2, title Y07. Day specific number of observed migrating woodlarks in autumn 2007. Checksum for Y07 = 323. Column 3, title Y08. Day specific number of observed migrating woodlarks in autumn 2008. Checksum for Y08 = 361. Column 4, title Y09. Day specific number of observed migrating woodlarks in autumn 2009. Checksum for Y09 = 217.Woodlark_data.txt 文件说明 本文件为制表符分隔的ASCII格式文件，记录了2007至2009年秋季汉科鸟类观测站（Hanko bird observatory）监测到的迁徙林百灵（woodlark）的种群数量统计数据。 本次研究涵盖的迁徙时段为9月1日（年积日245）至11月10日（年积日315）。 文件首行为标题行。 列定义如下： 1. 第1列标题为DOY（Day-of-year，年积日）：以年积日形式标注迁徙季时间，范围为9月1日（年积日245）至11月10日（年积日315），该列校验和为19880。 2. 第2列标题为Y07：记录2007年秋季单日观测到的迁徙林百灵数量，该列校验和为323。 3. 第3列标题为Y08：记录2008年秋季单日观测到的迁徙林百灵数量，该列校验和为361。 4. 第4列标题为Y09：记录2009年秋季单日观测到的迁徙林百灵数量，该列校验和为217。