How do migratory birds take rest while flying over oceans?

There has been research done to suggest that birds are capable of putting one half of their brains asleep at a time, thus maintaining the ability to navigate. This is called unihemispherical slow-wave sleep. read more

Most birds do not. Turkey vultures are one of the best birds at using thermals to conserve energy while flying. If you have never noticed before, the next time you look up into the sky and see a large black bird with its wings formed into a slight V with the flight feathers a slightly lighter color, that is a turkey vulture. Watch it. read more

Birds use dynamic techniques to soar in the air over long distances. I'll be taking the example of one migratory bird, the Albatross. Albatrosses travel huge distances with two techniques used by many long-winged seabirds, dynamic soaring and slope soaring. read more