Everyone who's seen that awesome penguin movie knows that birds do all kinds of crazy things to find mates, food and habitat. They sledge for miles on their bellies, and huddle in the cold to keep their chicks warm, performing bizarre rituals of instinct all to keep their species going. They are remarkably adaptable-all birds are-as long as they are able to find a suitable habitat. But what happens when they can't? When the Antarctic ice belts start to melt and crack off, and the birds keep going there anyway? No more habitat. And eventually, no more birds.A less dramatic-but no less impactful-change is underway in North America. Analysis gathered by the National Audubon Society over the last 40 years reveals that global warming has had a significant impact on close to 60% of the 305 species that winter on this continent. Species have shifted north by an average of 35 miles, though some have moved a full 300. Audubon cites this data as evidence that global warming is taking its toll on the animal kingdom. To get an idea of which birds have been impacted the most, click here.
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