 
 <prompt> Wetin be di type of flight wey dey use pass energy? Based on di question wey dey before dis one, write small tori wey get di answer. E fit be 1 - 20 sentences. Context: <response>: Most birds fit fly, wey make dem different from almost all other vertebrate classes. Flight na di main way wey birds dey move around and e dey use am for breeding, feeding, and to run from predators. Birds get different adaptations for flight, including lightweight skeleton, two big flight muscles, the pectoralis (wey dey make up 15% of di total mass of di bird) and the supracoracoideus, as well as a modified forelimb (wing) wey dey serve as aerofoil. Wing shape and size dey generally determine di type of flight wey a bird species get; many birds dey combine powered, flapping flight with less energy-intensive soaring flight. About 60 bird species no fit fly, like many wey don die. Flightlessness dey happen for birds wey dey for isolated islands, probably because of limited resources and no land predators. Even though penguins no fit fly, dem dey use similar muscles and movements to "fly" for water, like auks, shearwaters and dippers. 