It has always struck me as a little strange that a vagrant that turns up once is added to the list, yet a bird that goes extinct is removed from the list. Perhaps if a vagrant does not turn up again for (say) 50 years it should also be removed from the list? There is also the interesting question of how often does a vagrant have to come before it ceases to be a vagrant? And – to be really philosophical – if a vagrant turns up and no-one twitches it then does it exist???
On 9 January 2011 12:16, Laurie Knight
> How long do you have to reside at a place before you are considered to be > part of the population? Do you include tourists and short-term foreign > students? I’m not sure what the average “half-life” of internment on > Christmas Island is. The long-term residents of Christmas Island are made > up of three ethnic groups: Chinese, Malays and mainland Australians. > > Shifting the focus of attention to the birds, would you include all the > vagrants exciting the twitchers in the bird populations of Xmas and CCK > Islands? > > LK > > > On 09/01/2011, at 10:32 AM, Carl Clifford wrote: > > Tom, >> >> I heartily agree. You could almost say that birding on Christmas and Cocos >> was SE Asian birding for xenophobes, except for the fact that the population >> of Cocos is mainly Malay and the population of Christmas is mainly Middle >> Eastern, albeit they are banged-up in a concentration camp >> >> Cheers, >> >> Carl Clifford >> >> >> On 09/01/2011, at 7:38 AM, Tom Tarrant wrote: >> >> Hi Frank, >> >> I think you are missing the point regarding that comment, as exciting as >> Christmas and Cocos sound (I would love to go birding there!) they are not >> in the same faunal zone as Australia so many birders don’t see the >> relevance. You may as well go New Caledonia and add those species to your >> ‘French’ list. >> >> Tom >> >> >> >> And I remember there was a comment about the possible Short-toed Eagle in >>> Victoria being better than the rarities reported on Cocos and Christmas >>> in >>> December. Sorry. Not even close!!! I saw 11 new birds for my >>> Australian >>> list, and I dipped on two. Even Mike Carter added 9 birds to his >>> Australian >>> list. >>> >>> >>> — >> ******************************** >> Tom Tarrant >> Kobble Creek, Qld >> >> http://kobble.aviceda.org >> >> http://picasaweb.google.com.au/aviceda/ >> ******************************** >> =============================== >> >> To unsubscribe from this mailing list, >> send the message: >> unsubscribe >> (in the body of the message, with no Subject line) >> to: birding-aus-request@vicnet.net.au >> >> http://birding-aus.org >> =============================== >> >> =============================== >> >> To unsubscribe from this mailing list,send the message: >> unsubscribe(in the body of the message, with no Subject line) >> to: birding-aus-request@vicnet.net.au >> >> http://birding-aus.org >> =============================== >> > > =============================== > > To unsubscribe from this mailing list,send the message: > unsubscribe(in the body of the message, with no Subject line) > to: birding-aus-request@vicnet.net.au > > http://birding-aus.org > =============================== > ===============================
To unsubscribe from this mailing list, send the message: unsubscribe (in the body of the message, with no Subject line) to: birding-aus-request@vicnet.net.au
http://birding-aus.org ===============================
