write any two characters of bird
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Birds are endothermic and, because they fly, they require large amounts of energy, necessitating a high metabolic rate. Two types of flight feathers are found on the wings: primary feathers and secondary feathers. ... Primary feathers are located at the tip of the wing and provide thrust.
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Birds are endothermic and, because they fly, they require large amounts of energy, necessitating a high metabolic rate. Two types of flight feathers are found on the wings: primary feathers and secondary feathers. ... Primary feathers are located at the tip of the wing and provide thrust.
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