Don’t they need sleep?
How do they know to start on the exact same day every year? Fly to the exact same place?
I am a bit jealous of the scientists who get to work with such amazing creatures :)
And lots of birds perform marvelous feats of long-range navigation, storks, for example, travel thousands of kilometers each year to return to their nest for breeding.
They are amazing creatures.
There are dragon flies that migrate from India to Africa. It takes three generations to complete the round trip. So how do they know? It must be just a feeling.
I guess that a long time ago when India and Aftrica were adjacent parts of Gondwana land, the migration must have been quite short. But as the continents drifted apart the dragoon flies had to adapt to the longer route.