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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