An inexperienced bird-watcher may even encounter difficulty in spotting birds on the treetops in broad daylight; need I expound on the complication of searching through the forest for birds at night?
晚上找鳥，白天又不能安心睡覺。因為白天要做角鴞棲息環境的動植物調查，及整理前夜調查紀錄；此外，還要設法捉住它們，套上足以辨識的腳環，以核算數量。