1. Weighty wings
Around a third of a bird’s body weight is made up of the large wing muscles. These are the machines that power flight, keeping the bird airborne for large periods of time.
2. In a flap
Flapping is one of the most common flying methods, but it uses the most energy. Some birds alternate between flapping and gliding to conserve energy.
3. Hitching a ride
Taking advantage of the rising air thermals and updrafts, some birds soar in a circle around these areas to lift them higher, with minimal energy expended.