Hi! I am new to TPF, and I am hoping someone can help me with an exposure question. I photograph birds from my office window through the glass using a Canon 40D and Canon 70-200 2.8L IS lens. I am having alot of trouble getting the correct exposure when there are birds on my feeder with snow in background. The birds are always too dark. Any suggestions would be great!

1/1000
f3.2
Aperture Priority
ISO 320
Exposure +1.3 in camera
If I turn down the shutter speed, I get blown highlights from the snow in the background, but the birds are better exposed. I feel like I have tried everything, but I am sure there is something I have left out!
Here is another one I took the same day ~ it was 20 below F in South Dakota and the birds were just trying to stay warm!

This poor guy has ice crusted around his eyes!
&n