被誉为“杰出的飞行家”的雨燕的一生,很多时间都是在飞行中度过的。它们在飞行中进食,在飞行中梳理,在飞行中交配,甚至于在飞行中睡觉。仅在抚育小鸟时雨燕才回到地面,老雨燕一直把小雨燕养到能够首次振翅飞翔并再也不返回鸟巢,才重新飞上蓝天。雨燕在悬崖峭壁或高高的树顶上 Swift, best known as a “great pilot,” spent much of his life in flight. They eat in flight, groom in flight, mate in flight, and even sleep in flight. Swift only returned to the ground when tending birdies, and the old Swift kept the Petty Swift flying for the first time and never returning to the bird’s nest before flying back to the sky. Swifts on top of cliffs or tall trees