The World of the Monarch Butterfly
Description:... Tens of millions of monarchs in North America migrate to a single small area of rare oyamel forests high in the mountains west of Mexico City. How does each generation find its way to the same place every year? How do monarchs know when to begin their journey? And what causes monarchs born at the end of the summer to migrate while those born in midsummer don't? Well-known science writer Eric S. Grace explores these and other questions, describing the dangers of migration, the monarch's use of the milkweed plant as a defense against predators, the intricate courtship rituals of the monarch, and the dramatic metamorphosis that transforms a voracious stay-at-home caterpillar into an elegant and gregarious beauty. He also discusses the tragic loss of monarch roosting sites to logging, the destruction of monarch habitat by agriculture and urbanization, and the need for international cooperation to protect the monarch.
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