birding-aus

NSW Ostriches

To: <>, <>, <>, <>
Subject: NSW Ostriches
From: "Steve Potter" <>
Date: Tue, 26 Oct 2010 17:37:56 +1030
Not to mention that half of us will be ticking the Dodo in 30-48 years!!

I'd rather see them now..... But they'll never look as good as they do in
Africa!! Which I have seen.

Steve

 

NSW Ostriches


from [
<http://bioacoustics.cse.unsw.edu.au/archives/cgi-bin/namazu.cgi?query=%2Bfr
om%3Apratincole%40esc.net.au&idxname=birding-aus&sort=date%3Alate> Tony
Russell]

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Date: 

Tue, 26 Oct 2010 14:29:39 +1030

                                

 


Aha ! But if you don't apply the 3 generation rule you can tick them
earlier.
 
Tony
 
-----Original Message-----
From: 
 On Behalf Of Dave Torr
Sent: Tuesday, 26 October 2010 1:52 PM
To: Nikolas Haass
Cc: birding-aus
Subject: NSW Ostriches
 
Whether one counts them or not is a matter of personal preference - however
it is important that people record such things (if they are going to record
sightings at all) else it becomes hard in later years to track the spread of
such species. There seems to be a tendency in some places to only record
"natives" and ignore everything else.
 
On 26 October 2010 14:12, Nikolas Haass <> wrote:
 
> Hi all,
> 
> If you want to count introduced species (which in my personal opinion
> doesn't
> really make sense), shouldn't you at least apply the "three generation
> rule" (=
> 3
> 
> proven self-sustaining generations)? For long-lived birds like Ostrich,
> this
> means approximately 30-48 years of proven self-sustaining population.
Thus,
> the
> NSW Ostriches need another 10-28 years to become "tickable".
> 
> Cheers,
> 
> Nikolas
>  ----------------
> Nikolas Haass
> 
> Sydney, NSW
> 

 

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