|To:||canberra birds <>|
|Subject:||Paucity of Crested Pigeons? - GBS Data from continuous sites|
|From:||Duncan McCaskill <>|
|Date:||Mon, 27 May 2013 22:42:15 +1000|
Here is another chart showing the Crested Pigeon "A" value from 2003 to 2012.
The red line for the whole GBS. The blue line is restricted to sites that were operating all 5 years before 2012 (from 2008). That is 49 sites from 2008 onwards, but dropping down to only 25 sites for 2003. It looks to me a lot like a real decline.
On 27 May 2013 17:25, John Layton <> wrote:
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