+**Bird**
+Birds are feathered, warm-blooded [vertebrate](/wiki/vertebrate) animals. They are characterized by wings, beaks, the laying of hard-shelled [eggs](/wiki/egg), and often the ability to fly. From soaring eagles to tiny hummingbirds, they inhabit nearly every ecosystem on Earth.
+## See also
+- [Flight](/wiki/flight)
+- [Feather](/wiki/feather)
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