Yes, the ostrich is a bird even though it cannot fly. Flightlessness is a trait shared by several species of birds, including the ostrich, emu, kiwi, and penguin.
While the ostrich cannot fly, it is a skilled runner and can reach speeds of up to 70 km/h (43 mph), making it the fastest bird on land. The ostrich's powerful legs are adapted for running, with two toes on each foot, and can cover long distances without tiring.
Despite their inability to fly, ostriches have other adaptations that make them well-suited for their environment. For example, their wings are used for balance and to help them change direction while running, and their long necks allow them to scan their surroundings for predators.