Eagle
An albatross can glide over a thousand miles without flapping its wings.
condor
the flapping of the wings propel the bird forwards
Thrust and lift
By flapping it wings causing enough momentum for the bird to fly.
By flapping it's wings like every other bird on the planet.
A bird can flap its wings without moving by using its muscles to create a motion similar to flapping, but without actually lifting off the ground or moving forward. This can be done as a form of exercise or to maintain balance while perched.
The bones are hollow and make the bird light and he can fly by flapping his wings.
When a bird flaps its wings without taking flight, it typically does so to maintain balance, regulate body temperature, or communicate with other birds. The movement is rhythmic and can vary in speed and intensity depending on the bird's needs.
Iron Birds
it creates thrust
A bird creates lift by flapping its wings Aircraft move by the air moving over the wings (where as birds move by moving their wings around the air)