If you enjoy hunting, photographing or just watching birds, you may have to move to Canada in a few decades, according to Audubon. The venerated US conservation society just released interactive maps along with an article showing exactly how bird species across North America are menaced by man-made global warming. Following a seven-year study, the news isn't great: many migratory birds could be extinct within 70 years, while others may leave their home states and provinces forever. Though the predictions are theoretical, Audubon's scientists took a conservative approach, ironically using modeling techniques common in farming and energy resource management. It stressed that "Audubon is not in the business of using scary language or going beyond what the science tells us," but called the threat to bird species "urgent."