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Monarchs and Milkweed - A Migrating Butterfly, a Poisonous Plant, and Their Remarkable Story of Coevolution (Hardcover)
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Monarchs and Milkweed - A Migrating Butterfly, a Poisonous Plant, and Their Remarkable Story of Coevolution (Hardcover)
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The fascinating and complex evolutionary relationship of the
monarch butterfly and the milkweed plant Monarch butterflies are
one of nature's most recognizable creatures, known for their bright
colors and epic annual migration from the United States and Canada
to Mexico. Yet there is much more to the monarch than its
distinctive presence and mythic journeying. In Monarchs and
Milkweed, Anurag Agrawal presents a vivid investigation into how
the monarch butterfly has evolved closely alongside the milkweed--a
toxic plant named for the sticky white substance emitted when its
leaves are damaged--and how this inextricable and intimate
relationship has been like an arms race over the millennia, a
battle of exploitation and defense between two fascinating species.
The monarch life cycle begins each spring when it deposits eggs on
milkweed leaves. But this dependency of monarchs on milkweeds as
food is not reciprocated, and milkweeds do all they can to poison
or thwart the young monarchs. Agrawal delves into major scientific
discoveries, including his own pioneering research, and traces how
plant poisons have not only shaped monarch-milkweed interactions
but have also been culturally important for centuries. Agrawal
presents current ideas regarding the recent decline in monarch
populations, including habitat destruction, increased winter
storms, and lack of milkweed--the last one a theory that the author
rejects. He evaluates the current sustainability of monarchs and
reveals a novel explanation for their plummeting numbers. Lavishly
illustrated with more than eighty color photos and images, Monarchs
and Milkweed takes readers on an unforgettable exploration of one
of nature's most important and sophisticated evolutionary
relationships.
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