southward movement of bird distribution

[Andrew Taylor <>]

On Thu, Dec 04, 2008 at 06:38:17AM +1000, peter crow wrote:
>  A very interesting comment. Did you use maximum, average or minimum  
> temperatures for your calculations.  From the little I've read on this  
> matter it seems that changes in minimum temperatures are the ones to be 
> concerned about.

I used BOM's mean temp.  Yep, for some species winter mins could be the key,
for others maybe summer maxes and so on.

But there is a fair chance these varaiable  show similar trends.

Andrew