Although the beak is thus very inferior as a sifter to that of a shoveller, yet this bird, as every one knows, constantly uses it for this purpose. 查尔斯·达尔文.物种起源.
The beak of a shoveller-duck (Spatula clypeata) is a more beautiful and complex structure than the mouth of a whale. 查尔斯·达尔文.物种起源.