black on white

canberrabirds

black on white

To:	<>
Subject:	black on white
From:	"Geoffrey Dabb" <>
Date:	Sun, 12 Feb 2012 10:47:46 +1100

On the matter of the visibility of those partially black secondaries on white ibis in flight, I found the below confirming that the black is not visible from below, but is from above, extent varying on individual birds

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