HKBWS BBS 香港觀鳥會新聞組


    
      
        HKBWS BBS 香 港 觀 鳥 會 新 聞 組
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        Special Topics 特別主題 >> Winter Altas Survey 冬季鳥類普查 >>  Rare bird near Tung Tze (Shuen Wan) sq
        
(Message started by: Captain on Dec 15^th, 2003, 10:53am)

Title: Rare bird near Tung Tze (Shuen Wan) sq
Post by Captain on Dec 15^th, 2003, 10:53am

Two Yellow-legged Buttonquails were seen on 12 Dec at about 3:15 pm at a small hill near Tung Tze by Mike Kilburn and me.

Although it was seen in the afternoon, don't know whether this observation can contribute to the Winter Bird Survey.

Title: Re: Rare bird near Tung Tze (Shuen Wan) sq
Post by HF_Cheung on Dec 18^th, 2003, 8:07pm

Dear Captain,

Certainly not. Any species outside the designated survey period should not be counted, else there will be observation time bias.

HF Cheung

Title: Re: Rare bird near Tung Tze (Shuen Wan) sq
Post by Captain on Dec 19^th, 2003, 10:01am

Could birds recorded in non-target time during the survey period be put to an appendix as a reference?

Captain

Title: Re: Rare bird near Tung Tze (Shuen Wan) sq
Post by Geoff Carey on Jan 24^th, 2004, 7:10pm

If we did that, Captain, then all bird records made during the survey period and submitted to the Society would need to go in an Appendix. In this respect, there is no difference between your interesting buttonquail record and the Chinese Bulbuls I see every winter's day.

The best place for your buttonquail record, which is very interesting, is in the Excel file for all records of non-rarities, which is available on the website. These records will then be used in preparation of the Systematic List in the HKBR.

Incidentally, this file has recently been updated to be more user friendly, and now includes the latest HK List with recent additions.

Regards,

Geoff

Title: Re: Rare bird near Tung Tze (Shuen Wan) sq
Post by Captain on Jan 25^th, 2004, 11:38pm

OK. OK. The principle behind is understood. But just some comments on the survey itself.

It is ture to consider all bird records if the survey is aimed at finding out the bird diversity of a square. More bird records are no harm to the survey, even through they are bulbuls

It is incorrect to consider bird records outside the study time if it is a quantitative survey, esp if we want to study the long term trend, and compare the abundance among squares.

So, is the Winter Bird Atlas survey a quantitative survey? Pls don't mind I asked this question as I missed the briefying in the beginning of this survey.

Title: Re: Rare bird near Tung Tze (Shuen Wan) sq
Post by Geoff Carey on Jan 29^th, 2004, 11:57am

Yes, it is a quantitative survey.

Geoff