According to the Audubon Society, the birds make "long nonstop flights between key stopover points". I suppose that means they must stop on the journey and then continue. I guess they need to refuel in order to continue flying.
Thanks for coming by. It seems all wildlife suffer from competition with human activity. We are not very good at sharing the earth, are we?
Actually, we claim to be above nature but we still follow the same rules; Survival of the fittest. Although we take it too far at times.