The arctic tern resists distraction because it is driven at that moment by an instinctive sense of something we humans find admirable: larger purpose.

An arctic tern, on its 20,000 km flight from the extreme south of South America to the Arctic circle, will take no notice of a nice smelly herring offered from a bird-watcher's boat along the way.

The understanding is that the Arctic Tern is a migratory bird which is mainly found at the North Pole and surrounding regions.