Kingfishers wedge themselves into water with a streamlined beak that gradually increases in diameter from tip to head, letting water flow past.
翠鸟流线型的长喙从尖端到头部的直径是逐渐增大的，潜水时会让水流向身后。
Kingfishers wedge themselves into water with a streamlined beak that gradually increases in diameter from tip to head, letting water flow past.
翠鸟流线型的长喙从尖端到头部的直径是逐渐增大的，潜水时会让水流向身后。
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