Perhaps long ago our alien friends transported the Golden Plovers first class! Maybe all those years of looking out the window became so incased in their memories that it enabled them to eventually figure out how to do it on their own!
Well, the alien transport is long gone, and now our fine feathered friends must endure fog, rain, and cold when they make their long and tiring journey. Surely they miss the days of old on that wonderful first class flight!