At 350 pounds (160 kg), ostriches may be too heavy to fly but boy can they run - up to 40 miles (64 km) per hour! Birds that Don't Fly features the twenty types of birds that can't get off the ground exploring: - how these birds evolved to suit their unique habitats or hunting behaviors - a range of flightless birds including penguins, emus, and kiwis - how they live - how some, like the dodo, have become extinct
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