Flight , Insulation, , Flight , Insulation, How many Heart Chambers?, 1, 2, 3, 4, How is ammonia dealt with?, Dilution, Urea, Uric Acid, How are offspring born?, Live birth, Egg Birth, Egg hatches inside of mother, , High Speed wings, soaring wings, , High Speed Wings, Soaring Wings, Beak made of , chitin, keratin, , Perching Tendon, Preen Gland, Keeled Sternum, Hollow Bones, How does this bird stay waterproof?, Perching Tendon, Preen Gland, Keeled Sternum, Hollow Bones, , Perching Tendon, Preen Gland, Keeled Sternum, Hollow Bones, , Perching Tendon, Preen Gland, Keeled Sternum, Hollow Bones, How many breathing cycles to complete one breath?, 1, 2, 3, 4.
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Birds
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