Good places to start are these first few links regarding the effects of climate change on BIRDS:
National Audubon birds and climate change
BirdLife International birds and climate change
For many of us, an iconic species that is likely to be impacted dramatically - the polar bear - is symbolic of this issue in many ways
|Beaufort Sea retreating|
ice - Wikim. Commons
Polar Bears International climate facts
Lastly, if you would like more excellent background information, go the Union of Concerned Scientists' climate change page.