The warblers knew and flew away one day before April 2014 tornado struck

#Warblers Birds can sense some extreme changes in the environment and take evasive action as has been revealed by five golden-winged warblers that flew way from their nest just one day before the tornado struck in April 2014.
This s a finding of US scientists who have indicated that tracking data shows that these birds "evacuated" their nesting site and the geolocators also revealed that the birds left the Appalachians and flew 700-Km south to the Gulf of Mexico. Warblers are very tiny songbirds weighing about nine grams.
The next day, devastating storms swept across the south and central US.
Incidentally, these birds had completed their seasonal migration just days earlier and had settled down to nest after a 5,000-Km journey from Colombia.
In the opinion of ecologists, these birds - and others - may sense such extreme events with their keen low-frequency hearing.
The incident has come to light because of Dr Henry Streby of the University of California, Berkeley – he wanted to find out if tracking the warblers was even possible. This was just a pilot season for a larger study that was about to begin. He had been engaged in this work with colleagues from the Universities of Tennessee and Minnesota and had tagged 20 golden-winged warblers in May 2013, in the Cumberland Mountains of north-eastern Tennessee.
These birds are usually seen around the Great Lakes and the Appalachian Mountains, where they nest and breed every summer and, after disappearing to Colombia for the winter, 10 of the birds came back in April 2014. The team was in the field observing them when they received advance warning of the tornadoes and the warblers fled.