A new study published in the journal Nature and led by researchers from Royal Veterinary College in the UK, finds that the migrating birds carefully position their wingtips and sync their flapping, apparently to hook the former bird’s updraft and save energy during flight. Scientists concluded after tracking a group of large black birds, the northern ibises each equipped with ultra-light sensors with a tiny GPS device that had been trained to follow an ultralight aircraft.
The surprising fact is that the birds know how this formation contributes to the flock as a whole. Bird formations, called echelons, come in many arrangements. According to Scientific American, the “J†formation is actually more common than the “V†formation, but the V is probably the most commonly noticeable.