Bye bye birdies: Migration patterns are changing

I just read an article on Common Dreams about migratory patterns of birds. Global warming (or something) is causing them to change their normal behavior. For instance, snow geese are spending winters 200 miles farther north than usual, and purple finches, a whopping 400 miles more to the north of their usual winter hangout. The Audubon Society has released a report on changing migratory habits of North American birds. Read the Common Dreams report about it HERE. Also, take a look at patterns indicated in an Audubon map.