canberrabirds

spectacular gathering of corellas (not local!)

To: "'martin butterfield'" <>, "'Geoffrey Dabb'" <>
Subject: spectacular gathering of corellas (not local!)
From: "Philip Veerman" <>
Date: Sat, 19 Dec 2009 16:05:57 +1100
Good input there, Martin.
 
 
-----Original Message-----
From: martin butterfield [
Sent: Saturday, 19 December 2009 10:42 AM
To: Geoffrey Dabb
Cc: Cog line
Subject: Re: [canberrabirds] spectacular gathering of corellas (not local!) - and channel-billed cuckoo in Wanniassa yesterday

Geoffrey
It is always tempting to attribute range extensions to escapes and introductions. 

Looking at the attached  LB Corella map from birdata (at I think10 minute level rather than the one degree cells of the Atlasses) there appears to be a rather high correlation between reports of outlier LB Corella reports (other than Sinny metro area) and the watercourses of the Murray Darling system.  Possibly that is a coincidence reflecting the likelihood of towns being on the rivers (or birders being on the rivers) but it does suggest to me that the birds might have spread themselves up the system from Balranald(ish).

Martin

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