Looks like the three generation thing is out the window then - bit silly
anyway and impossible to apply to vagrant birds.
Tony
-----Original Message-----
From:
On Behalf Of John Tongue
Sent: Tuesday, 26 October 2010 10:34 PM
To: Nikolas Haass
Cc: birding-aus
Subject: NSW Ostriches
I wonder whether everyone will wait for three self-sustaining generations of
Arabian Shearwaters in Australian Territory before ticking them?? :)
John Tongue
Ulverstone, Tas.
On 26/10/2010, at 1:12 PM, 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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