These tiny little birds (smaller than an adult hand) fly all the way from New Zealand to Alaska without stopping, eating or drinking. Uh-mazing!
Takes a week or so for them to do this flight, and if that was not enough, the chicks that are only 2-3 months old do the return trip as well.
As for humans, here we are, marveling at ourselves that now a days kids (unaccompanied minors, that is, about 10 year olds) are doing international travels in airplanes and crossing borders that we ourselves have created in the first place. And then there are these birds, going on and on and on.