Today is Sunday ! - while many can relax – some have to be on the run all the time .. that is life !! – the flight of a bird is a wondrous thing.
Birds have hollow bones that are very light and strong. Birds fly by flapping their wings, steering mainly with their tails. Compared to the parts of an airplane, a bird’s wing acts as both wing and propeller.As feathers became elongated, perhaps for display, they became more suitable to support flight.
