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Customer Reviews for Calendars.com National Geographic Bird Coloration Book

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Calendars.com National Geographic Bird Coloration Book

Why is a cardinal red or a bluebird blue? Why do some birds have plumage that is intensely colored—is it pigment, light, gender, robust health, or some combination of all four? What roles do disease, climate, and wear and tear play in this process? What does feather display signal about sexual attra
Customer Reviews for National Geographic Bird Coloration Book
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