Re: [!! SPAM] Re: [Birding-Aus] Peafowl

To: Dave Torr <>
Subject: Re: [!! SPAM] Re: [Birding-Aus] Peafowl
From: John Tongue <>
Date: Fri, 27 Nov 2009 10:35:05 +1100
The whole question is really quite complex.  Migratory birds can't really be 
considered to have 'maintained' a breeding population here, but we still count 
them.  Then what about waders that turn up periodically - Hudsonian Godwit, for 
example?  Presumably listers are still able to tick them?  Then, what about 
Grey-headed Lapwing?  Isabelline Wheatear?  And so the complexities multiply.  
In terms of one's own life list, you just need to be happy with the rules you 
apply to yourself.  And if you want to compare and contrast life lists, then 
you just need to be using 'common' rules.

Anyway, that's my two bob's worth.

John Tongue
Ulvertsone, Tas.

On 27/11/2009, at 9:55 AM, Dave Torr wrote:

> Seems one of the ongoing questions on Birding-Aus is "is xxxx a tickable
> population". There seem to be two easy alternatives - either we count no
> introduced birds or we count them all. That would save a lot of debate I
> guess.... :-)
> Slightly more seriously - I guess it is very hard for anyone to determine in
> many cases whether the population has been self-sustaining for the required
> period of time (10 years I believe?). How do we know for any of these
> populations whether or not there have been further releases to boost the
> population - I recall that someone reckoned the Melbourne Bayside Barbary
> Doves were being replenished by further releases from time to time? Does
> being fed artificially  stop them being self-sustaining?
> 2009/11/27 Bill Stent <>
>> I feel somehow that the Melbourne populations aren't tickable, but I'm
>> looking for a good reason why not.
>> I'd be surprised if there were more than a dozen or so, which would suggest
>> they might be partially supported by human feeding (although I've got no
>> actual evidence for this).
>> Bill

<Prev in Thread] Current Thread [Next in Thread>

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the birding-aus mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU