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            Puffin's Vibrant Beaks:
            Puffins are known for their colorful and distinctive beaks, which play a role in courtship and mate selection. During the breeding season, these beaks become more vibrant, and potential mates use them to assess each other's health and genetic fitness.
         
    
        
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            Swifts' Non-Stop Flight:
            Common Swifts are remarkable for their near-constant flight. They spend almost their entire lives in the air, even sleeping and mating on the wing. They feed on insects caught in mid-air and are specially adapted for this high-energy lifestyle.