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Biological Evolution: Unity and Diversity: Vertebrates and Invertebrates
Birds
Description
Birds
Birds are warm-blooded vertebrates with feathers, beaks, and hollow bones that help them fly. They are found all over the world, from snowy mountains to tropical rainforests. One of the most important things about birds is that they lay eggs and often care for their young ...
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Transcript
From the tiny hummingbird to the towering ostrich, birds show remarkable variety, yet they all share some key traits.
Birds are warm-blooded animals with feathers, beaks, and two legs. They lay hard-shelled eggs and breathe through their lungs.
Many birds, like robins and eagles, can fly, while others, such as penguins and ostriches...
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