How Global warming will increase temperatures through the northern United states what will most likely be the effect on wildlife in this region?

By definition, global warming can not be "in North America". Global means "world-wide" and America is but part of the world. However, the United States can and will experience the impact of global warming. During the Winter Olympic Games, Canada was in the embarrassing position of having to truck in snow from hundreds of kilometres away: that is the public face of global warming.

Some will scoff, but global warming can result in the US experiencing localised episodes of extreme cold, simply because of changing wind patterns from the Arctic region. Some also scoff when told that the recent extremes of hurricane and tornado activity could well be the result of global warming.

We do know that the average global temperature is increasing. Average temperatures in the United States will also inevitably increase. However, those are averages and there will be occasional localised extremes of either heat or cold.