Australian White (Sacred) Ibis Markings

Subject: Australian White (Sacred) Ibis Markings
Date: Mon, 4 Aug 2003 18:14:40 +1000

On a few occassions, i've seen a blood red stain under the wings of Australian Ibis, which i've assumed has been part of their breeding plumage.

I noticed the other day, that this patch under the wing, is actually transparent when they are not in breeding plumage. From some photos i have taken, it looks as if you can actually see the bones and tendons of the wing through this  'window'.

Can anyone tell me any more information on this particular characteristic of the Sacred Ibis?

Is this marking 'stained' red by blood that pumps through this section during breeding season?

Any info or references would be appreciated.

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