And those little guys don't go very far compared to others! The Arctic Tern is the winner for sheer distance.
http://news.nationalgeographic.com/news ... tern-bird/Having been a birdwatcher since middle school and now a citizen-scientist wildlife spotter, migration has fascinated me for a while. And it's crucial to know what's around when if you want to catch the birds that pass through for only a short time. I got very lucky a few years ago when I caught a glimpse of long-tailed ducks in Boston Harbor.