Birds That Can't Fly
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Ostriches are flightless birds as they are too heavy, have small wings, and flat breastbones
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Penguins can't fly through the air, but they can fly through water. Their wings are adapted for swimming
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All steamer ducks except the flying steamer duck are flightless. Even flying steamer, capable of flight, rarely takes to the air
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Kiwi has small wings but can't fly because its flat breastbone lacks the keel that anchors the pectoral muscles needed for flight
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Cassowaries are flightless birds because of their size, weight, and lack of some anatomical structures for flight
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The kakapo is a large, green parrot native to New Zealand that is unable to fly
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The takahe is a flightless bird that uses its wings for courtship displays and aggression instead of flight
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Weka, one of New Zealand's iconic large flightless birds, have sturdy legs, a strong tapered bill, and reduced wings
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