Global warming changing birds’ habitats

According to a new report released by the Audubon Society, over 350 species of birds are spending winters further north than they did 40 years ago.  While there are other factors which cause birds to change their range, scientists believe that the only explanation for such a large number of species to move north is global warming.  Over the past 40 years, temperatures in January have risen approximately 5 degrees Fahrenheit. With the warmer temperatures, the birds need less food to survive in the cold, allowing them to live in places that were previously inhabitable. Temperature changes have different effects of individual species, so while some birds may not travel as far south in the winter, others are traveling further north at the same time.