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This Concept Map, created with IHMC CmapTools, has information related to: Birds, Feathers help to Fly, Birds have Feathers, Energy much is required to Fly, Rapid Digestive Systems provide for Light body weights, Light body weights help to Fly, Feathers offer Insulation, Birds require Food, Birds have Beaks, Warm-Blooded Animals produce Heat, Birds some do Fly, High metabolism provides Energy, Birds are Endotherms, Warm-Blooded Animals maintain Constant Body Temperature, Endotherms means Warm-Blooded Animals, Birds have Rapid Digestive Systems, Birds lay Eggs, Rapid Digestive Systems is necesarry due to High metabolism, Hollow Bones provide for Light body weights, Heat from Food, Birds have Two Feet