Hi Josh,
Not so sure if this Powerful Owl's condition fits into the category "blown
eyes" or "flecks". Asymmetric pupils can also be caused by brain damage or
intraocular masses - such as a tumour. Maybe it is just the reflection of the
owl's surroundings in its cornea, but doesn't it almost look like that there is
some kind of an intraocular structure that doesn't belong there? Maybe this owl
does have some kind of a tumour in its left eye?
Cheers,
Nikolas
----------------
Nikolas Haass
Sydney, NSW
________________________________
From: Joshua Bergmark <>
To:
Sent: Friday, April 20, 2012 8:07 PM
Subject: Blown eyes
This reminded me of a post on Feathers and Photos forum a while ago - one of
Fatih's photos of a Powerful Owl. It's the same condition isn't it?
http://www.fthsm.com/Galleries/Birds/Owls-and-Night-Birds/11777741_CNRbBd#!i=734193588&k=cto2c&lb=1&s=A
Regards Josh
> From:
> To: ; ; ;
>
> Date: Fri, 20 Apr 2012 18:47:12 +1000
> Subject: Re: [Birding-Aus] Blown eyes
>
> 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: Re: [Birding-Aus] 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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