Answer :
Ostriches are superb runners that can sprint at speeds of up to 45 mph(72 km/h) on average, with a peak 60 mph (97 km/h) during short periods, with 12 foot strides. This also makes the ostrich the fastest animal on two legs.
73 mph is the average speed of all the animals according to the latest scientific research sometime it can also be 75 mph