However, there are various types of flying. For example, wagtails and woodpeckers flap their wings until they get some momentum and then will fold them in until they need more momentum again, and then repeat the process.
Petrels ride the air currents over the sea using a technique called dynamic soaring.
The sight of a flock of grey-faced buzzard eagles soaring on an ascending air current is quite spectacular. There are some birds that will use both types of flying, depending on the situation. For example, the black kite likes to glide, but will flap its wings when returning to the nest at night. There's no end to the research that could be done to see what techniques birds will use in various situations. Various ways of walking We tend to concentrate on flying techniques when talking about birds' modes of transportation.