Passerine bird abundance
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The avifauna is monitored with special emphasis on passerine birds representing the highest trophic level. Weekly counts of birds are carried out at 13 census points during the entire season. Other bird observations are recorded ad-hoc during the entire field season. For further details, please refer to the newest BioBasis manual available at the website.
本数据集针对鸟类区系（Avifauna）开展监测工作，重点关注处于最高营养级（Trophic level）的雀形目鸟类（Passerine birds）。在整个野外监测季内，于13个普查点位开展每周一次的鸟类计数工作；同期还会临时记录其余鸟类观测数据。如需了解更多细节，请查阅官网可获取的最新版《BioBasis手册》
