"U.S. scientists say tracking data shows that five golden-winged warblers "evacuated" their nesting site one day before the April 2014 tornado outbreak."
"The next day, devastating storms swept across the south and central U.S."
"They escaped just south of the tornadoes' path - and then went straight home again. By 2 May, all five were back in their nesting area."
Read full article here: http://www.bbc.com/news/science-environment-30531060