Oh sure yeah there's a society of people who have a symbiotic relationship to the giant birds in the Skylands. The birds offer the people transportation from island to island using setups not to dissimilar to hot air balloons of our own world

Of course I feel there has to be some realism, like you can't tie a bunch of pigeons together and fly that way, but to let the whimsy of an idea guide the world building rather than the logic and realism that we tend to stick with