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Thanks to Ryan Douglas for replying offlist, but just in case the any of the rest of you are as lucky as I have been, I'll pass the info on to the list. 
Cornell recommends 3:1 water:sugar mix in adverse conditions.  http://www.allaboutbirds.org/page.aspx?pid=1181

Good birding,
Greg Swick
Ozark, MO

On Tue, Nov 25, 2014 at 2:51 PM, Greg Swick <[log in to unmask]> wrote:
Hi MoBirders,
Today I had a visitor from Indiana to see the Calliope Hummingbird.  In passing, I said that I had changed the concentration yesterday from 4 parts water to 1 part sugar to 3:1.   She don't me not to do this as it can cause edema in the hummer.  I had read on the internet that it is preferable to feed 3:1 in the winter as additional energy is needed, and the freezing point is slightly reduced.
Since I am monitoring the feeder daily, the freezing point benefit is not necessary.  But addressing the additional energy requirements of the hummer with a 3:1 mix makes sense to me. 

Am I hurting the hummer be feeding a 3:1 water:sugar mix?

Thanks for any insight you can provide,
Greg Swick
Ozark, MO

--
Greg Swick, Co-Director
Green Leadership Academy for Diverse Ecosystems (GLADE)
 
I believe that there is a subtle magnetism in nature, which, if we unconsciously yield to it, will direct us aright. ~Henry David Thoreau

 
 



--
Greg Swick, Co-Director
Green Leadership Academy for Diverse Ecosystems (GLADE)
[log in to unmask]
www.greenleadershipacademy.org
 
I believe that there is a subtle magnetism in nature, which, if we unconsciously yield to it, will direct us aright. ~Henry David Thoreau

 
 


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