Associated Press: Global climate change poses a significant threat to migratory bird populations, which are already stressed by the loss of habitat and environmental pollution, according to a report released Thursday. U.S. Interior Secretary Ken Salazar joined scientists and conservation organizers at an Austin news conference to release the study, “The State of the Birds: 2010 Report on Climate Change.” The report says oceanic birds, such as petrels and albatrosses, are at particular risk from …