Global warming threatens two-thirds of North American bird species
National Geographic reports: As they soar through the sky, birds seem blissfully impervious to the stresses of Earth. Indeed, their ability to migrate makes them more resilient to habitat disruption than less dynamic creatures. That makes the most recent annual report produced by the National Audubon Society, a nonprofit dedicated to protecting birds and their habitat, particularly startling. Released this week, the report predicts that if Earth continues to warm according to current trends—rising 3 degrees Celsius (5.4 degrees Fahrenheit)…