I’ve heard the hummingbirds hitch rides on geese or cranes.
Could happen— don’t doubt it a bit, they are something else. Had one that got taken out by a 10’ Praying Mantis hiding on a feeder (that was a real shock, the thing eating the little bird’s guts still hanging on to the feeder).
Oil derricks in the Gulf put out feeders and they get swarmed— so there is that “assist” that didn’t used to happen. Over history— they follow the flowers and the bugs down the coast of Mexico as the seasonal tilt happens.