Swift wings shape

To: birding-aus <>
Subject: Swift wings shape
From: Chris Brandis <>
Date: Thu, 26 Apr 2007 19:33:07 +1000
Hi all
Those who watch seabirds see this in action as as the wind strength rises the shape of seabird wings change similar to that described and also whether they are with or against the wind and you would be surprised how fast they can travel into the wind with direct or a sort of tacking maneuver.
Cheers  Chris


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