The monarchs are missing a butterfly mystery

Monarch butterfly populations have been declining for the last two decades, and scientists aren't sure why. This book takes readers on a quest to discover what is happening and what scientists know. --

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Bibliographic Details
Main Author: Hirsch, Rebecca E.
Format: Books Print Book
Language:English
Published: Minneapolis : Millbrook Press, [2018]
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Description
Summary:Monarch butterfly populations have been declining for the last two decades, and scientists aren't sure why. This book takes readers on a quest to discover what is happening and what scientists know. --
Physical Description:56 pages : illustrations (chiefly color), color maps ; 26 x 26 cm
Audience:Age 8-12.
Grade 4 to 6.
Bibliography:Includes bibliographical references and index.
ISBN:9781512452501
1512452505