分佈區域
外部特徵
上身黑褐色,腰部有淡色腰斑,下身灰褐色。
習性
此鳥終日沿着海岸、島嶼飛行捕食飛蟲,幾乎很少休息。飛行時不似家燕那樣作急劇轉折,這是因為它的尾羽不呈叉狀的緣故。繁殖期在4~6月,每窩產兩枚卵。它的巢為半透明塑膠碟狀,通常築於崖隙或岩洞中,採制為名貴食品燕窩。
參考文獻
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