Songbirds Fled Tornadoes 500 Miles Away. How'd They Know?

Golden-winged warblers abandoned their nests and flew 932 miles to escape a deadly supercell storm, but the storm was still 250 to 560 miles away when they left. While meteorologists tracked the approaching system with satellites, these tiny songbirds detected something our technology couldn't: infrasonic sound waves generated by tornadic storms, frequencies below human hearing that travel thousands of miles. The 2014 storm killed 35 people, but the warblers had already evacuated.