From Earth & Sky
The farthest flier is the Arctic Tern, an elegant white seabird. It breeds on the shores of the Arctic Ocean in Northern Hemisphere summer. And it feeds over the Southern Oceans half a year later -- in Southern Hemisphere summer. North American Arctic Terns fly about 40,000 kilometers, or 24,000 miles, each year -- about equal to the distance around the Earth. An Arctic Tern can live for 25 years, so in its life-long quest for summer it can fly a million kilometers -- nearly three times the distance from the Earth to the moon - Millet

Millet
I love birds and the Artic Turn is an amazing bird to say the least. Some of my favorite moments were spent on offshore platforms in the Gulf of Mexico. During the winter the Gannets would dive from 50-75 feet in the air to plunge 20-30 feet down to catch a fish that we humans could not see from 20 feet’
Purple Martins are my favorite bird and I have houses for them when they return each spring. They fly across the Gulf of Mexico non-stop and it takes them approximately 21-24 hours. They migrate from Brazil to North America all the way into Canada. Particular birds ,because they want to return to the same Martin house and the same nest cavity that they used the previous year. Move the house 20 feet and it is highly possible that they will reject the new location and move to another location.

Karpes, nature is truly amazing. - Millet

OK now that we know which bird migrates the farthest, can anyone name the bird that migrates the least?- Millet

Just guessing...a Robin? (our state bird BTW)
I know you know this, but a lot of ppl don't know that the only reason birds migrate south from here is for food. Heard that on a nature show.
But then, if that's true, why do some birds stay here all winter? Cardinals, are nice to see in winter! Wish the sparrows & grackles would fly south and STAY there LOL.