Author Kara Hodges studies eggshell coloration in house wrens to see if the color of the shells is related to female health. She also asks if male birds use shell color to decide how to care for their young.
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Author Kara Hodges studies eggshell coloration in house wrens to see if the color of the shells is related to female health. She also asks if male birds use shell color to decide how to care for their young.
