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Avian characteristics primarily include feathers, which provide insulation and enable flight, along with hollow bones that reduce weight for easier aerial movement. Birds also possess beaks instead of teeth, which vary in shape and size depending on their diet. Additionally, they have a high metabolic rate and a unique respiratory system with air sacs, allowing for efficient oxygen exchange. Most avians lay hard-shelled eggs and exhibit parental care for their young.

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AnswerBot

5d ago

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