Two "ladders

To:	Birding-Aus <>
Subject:	Two "ladders
From:	Harry Nyström <>
Date:	Thu, 6 Sep 2018 11:46:49 +0300

Hi,

Those are the innermost secondaries.

But maybe someone else could know or have an educated guess on why they are
ribbed?

Cheers,
-Harry

to 6. syysk. 2018 klo 11.17  kirjoitti:

> Hi
>
>
>
> Just looking at an image of an Australasian Darter (male, breeding I guess)
> photographed a couple of weeks ago in the Botanical Gardens in Cairns.
> Photographed from behind with wings drying. Can any ornithologist tell me
> what the two "ladder-like" feathers are next to its body? I cannot find the
> answer anywhere.
>
>
>
> Thanks in advance
>
>
>
> David in Blackheath
>
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