. The bird, its form and function . ^ movement at the shoulder-joint, make the propellerof a ship an apt simile. The colour of the feather-scaleson the upper side of the wing is dark, like the back ofthe bird, but those on the under side have run rampant,the white and l)lack ]:»oing mixed irregularly, not corre-sponding even in the two wings of an individual bird. The outline of the wing is exactly like that of a sharksfin, the flatness and breadth including even the bones,while (also like a fin) all of the bending quality of a wing. 342 The Bird is lost,—all the flexibility of wrist and elbow
. The bird, its form and function . ^ movement at the shoulder-joint, make the propellerof a ship an apt simile. The colour of the feather-scaleson the upper side of the wing is dark, like the back ofthe bird, but those on the under side have run rampant,the white and l)lack ]:»oing mixed irregularly, not corre-sponding even in the two wings of an individual bird. The outline of the wing is exactly like that of a sharksfin, the flatness and breadth including even the bones,while (also like a fin) all of the bending quality of a wing. 342 The Bird is lost,—all the flexibility of wrist and elbow. \Mththese propellers the penguins fly through the water, withalmost the identical motion of a bird in the air. Thoughit is usually asserted that the wings move alternateh^,this was never the case with a pair of Black-footed Pen-guins which I carefully observed. As regards the speedof swimming, I found that one of these birds, though inbad health at the time and so weak that it could takebut a few steps on land, was able to progress under water
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Keywords: ., bookauthorbeebewil, bookcentury1900, bookdecade1900, bookyear1906
