The linked article is very interesting although I haven't read anything that proves the author's theory. He suggests the homing ability of racing homers is due to them being able to pick up the infrasound given off by the oceans, and reflected off surface structures on land...

frightened pigeons during a few meters meteor explosion On January 7, 2015 a giant meteor exploded over Romania and it was brighter than the Sun in Vrancea - Buzau, as witnesses said. I found this recording made at 200 km from the explosion site. Look in the upper right corner, how frightened...