Time Magazine: But that transcontinental migration is about to get even longer, thanks to global warming. In a new study in the Journal of Biogeography, scientists at Durham University and Cambridge University found that migration flights undertaken by warblers in Europe and Asia could be extended by as much as 250 miles by the end of the century. That’s because as temperatures rise, the habitats of birds like the whitethroat, which breed in Europe, will need to shift farther north to more hospitable …