Or do you mean “if a vagrant turns up and no-one twitches it, was it really there?”. More to the point, “if a vagrant turns up and no-one twitches it, does anyone really care?”
The big question for the twitcher might be “if a vagrant turns up and BARC doesn’t accept the observation, can I add it to my list?” 😉
LK
On 09/01/2011, at 11:25 AM, Dave Torr wrote:
> 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 > wrote: > 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 > =============================== >
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