Hovering of Birds | Nature


Hovering of Birds | Nature

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I REGRET that I did not notice until to-day that Mr. Airy, in his letter published in NAIURE, vol. xxvii. p. 294, specially referred to “hovering with perfectly motionless wings” as being


that for which an upward slant of wind is, as he believes, absolutely requisite to enable the bird to do so.


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