Monarch Butterflies Noah Adams talks with Sue Halpern, author of Four Wings and a Prayer: Caught in the Mystery of the Monarch Butterfly, about trip, following the migration of the monarchs from Canada to Mexico. (5:30) The book is published by Pantheon, May 2001.

Monarch Butterflies

June 21, 200112:00 AM ET

Heard on All Things Considered

Monarch Butterflies

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Noah Adams talks with Sue Halpern, author of Four Wings and a Prayer: Caught in the Mystery of the Monarch Butterfly, about trip, following the migration of the monarchs from Canada to Mexico. (5:30) The book is published by Pantheon, May 2001.