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This Concept Map, created with IHMC CmapTools, has information related to: birds Jack sedgwick 77835, birds have feathers, feathers help to fly, warm blooded animals produce heat, feathers offer insulation, birds have two wings, hollow bones provide for light body wieghts, birds have two feet, birds have rapid digestive systems, birds have breaks, birds lay eggs eggs, light body wieghts help to fly, birds are endotherms, food for energy, endotherms means warm blooded animals, energy much is required to fly fly, warm blooded animals maintain constant body tempeture, rapid digestive systems provide for light body wieghts, birds have hollow bones, heat from food, birds require food