Migratory Birds Fly Higher Over Deserts and Lower Over Seas -- Anatomy Explains Why
Researchers tracked 17 migratory bird species with miniature multi-sensor devices across the Sahara and Mediterranean, finding that birds flew 2,500-4,000 meters over the desert but sometimes just dozens of meters above open water. Wing morphology and plumage darkness explain the split -- with implications for offshore wind farm collision risk planning.