Don't forget that in estuarine environments - depending on tide, wind & rain,
river flow etc. conditions - varying amounts of freshwater would sit on top of
salt (which is much denser) water. Mixing can be very limited in the right
circumstances. So they may have been drinking quite fresh water?
Sent from my iPad
> On 26 Nov 2014, at 09:27, Martin Potter <> wrote:
>
> Hi Guys,
>
> On a walk last Sunday at the mouth of the Shoalhaven River NSW, we were
> lucky to see a small flock of Yellow-tailed Black-Cockatoos at close range.
> One of the birds flew to the ground, walked to the water's edge and appeared
> to start drinking what would be salt water. I am not sure of the exact
> degree of salinity of the water here , but the ocean is not far away. I have
> not observed this behaviour before and just wondered if this is unusual. I
> have uploaded some photos at
> http://s1079.photobucket.com/user/MandPBirds/library/Yellow-tailed%20Black-C
> ockatoo%20Shoalhaven%20Heads%20NSW?sort=9&page=1
>
> Thanks,
> Martin Potter
>
>
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