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