Why can’t penguins and ostriches fly?

Answer 1: Penguins, like other flightless birds (ostriches and emus) evolved from birds that could fly. In the process of evolution, the penguins hollow bones became solid and heavy so they could no longer lift themselves out of the water to fly. Their heavier bones made is easier for them to dive down into the water.Click to see full answer. Besides, why do ostriches have wings if they can’t fly?Ostriches, emus, cassowaries, rheas, and kiwis can’t fly. Unlike most birds, their flat breastbones lack the keel that anchors the strong pectoral muscles required for flight. Their puny wings can’t possibly lift their heavy bodies off the ground.Furthermore, can an ostrich fly? Why Ostriches Can’t Fly. The largest and heaviest living bird, the ostrich is flightless and instead is built for running. With its powerful legs, the ostrich can sprint in short bursts up to 43 mph (70 kph), and can maintain a steady speed of 31 mph (50 kph). So suggests new research into the DNA of the birds. In this way, why can’t penguins fly? Scientists believe penguins can’t fly because they likely had little or no threat from predators in their past. That means they never evolved to fly because they didn’t have anything to fly away from. They relied on the oceans for food, so developing flippers to swim well was more important than growing wings to fly.Why some birds have wings but never fly?Most flightless birds had ancestors that were able to fly. It was evolution that made them abandon the ability to fly. But no matter how large they could grow their wings, they’ll never be able to fly. They lack the essential keel bone that helps the wings to lift them up.