I am aware of two Black-necked Storks that had unusual eyes. One was
observed by a number of people in the Taree area. It appeared to have one
yellow iris and one dark (?brown) iris. Locals referred to it as the
'hermaphrodite stork' as it had one male coloured iris and one female
coloured iris. I observed a female Black-necked (Satin) Stork at Roberts
Creek, Woodford Island a couple of years ago. It was in the company of a
banded male. The female had one yellow iris and the other appeared dark
(brown) however when observed closer the iris seemed to be yellow but with
red colouring as if it was damaged and covered with broken blood vessels.
The male bred with a female with normal eyes and we don't know whether it
was the same bird that had the injury but that it had mended and returned to
being yellow or whether he chose another female. The female with the
damaged iris was observed once following the first sighting but has not been
seen since the birds started to breed. Unfortunately the banded bird was
killed on powerlines and the female had to raise the one nestling by
herself, a feat which she did successfully achieve.
Greg
Dr Greg. P. Clancy
Ecologist and Wildlife Guide
Coutts Crossing
NSW 2460
02 66493153
-----Original Message-----
From: Damien Farine
Sent: Friday, April 20, 2012 5:36 PM
To: ; ;
Subject: Blown eyes
Ahh but that blog missed out on one crucial bit of information. It is
interesting that they mentioned American oystercatchers because a paper was
recently published describing eye flecks as a reliable sexing method in the
American black oystercatcher. In essence, females have a full eye fleck
whereas males only a small one or none. Thus, it is unlikely that this is
caused by injury! Details of the paper are here: Guzzetti, B. M., Talbot,
S. L., Tessler, D. F., Gill, V. A., & Murphy, E. C. 2008. Secrets in the
eyes of Black Oystercatchers: a new sexing technique. J. Field Orn. 79:
215-223.
Damien
Date: Thu, 19 Apr 2012 20:49:41 -0700
From:
To: ;
Subject: Re: [Birding-Aus] Blown eyes
Hi Carl,
Thanks for that. Interestingly, that was the site I saw this morning!
Sonja
________________________________
From: Carl Clifford <>
To: sonja ross <>
Cc: "" <>
Sent: Friday, 20 April 2012 1:45 PM
Subject: Re: [Birding-Aus] Blown eyes
Sonja,
Sorry, can't help you with the cause, etc, but here are some good images
of "blown eye". Will have give bird's eyes a closer look.
http://www.mygreatsaltlake.com/2012/02/birds-with-blown-eyes/
Cheers,
Carl Clifford
Sent from my iPad
On 20/04/2012, at 11:58, sonja ross <> wrote:
> I was looking at an overseas birding blog this morning while having a
> coffee, and it was about "blown eyes", a term I hadn't heard before. It
> seems to be when the pupil leaks into the iris. Is this a term used
> here?
>
>
> I've recorded it once that I remember in a photo of a Great Egret, where
> one eye was normal, and the other had a dark area going from the pupil
> into the coloured area. Has anyone else seen this?
>
>
> The blog writer speculated about possible causes. Does anyone have
> thoughts about that?
>
> Thanks.
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