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This Concept Map, created with IHMC CmapTools, has information related to: BIRDS, BIRDS REQUIRE FOOD, BIRDS SOME DO FLY, BIRDS HAVE HOLLOW BONES, BIRDS ARE ENDOTHERMS, BIRDS LAY EGGS, BIRDS ARE WARM BLOODED ANIMALS, BIRDS HAVE BEAKS, BIRDS HAVE TWO FEET, BIRDS HAVE HIGH METABOLISM, BIRDS HAVE LIGHT WEIGHT BODIES, BIRDS HAVE FEATHERS