2 copies being processed for GDL Central Library Children's Non-fiction.
56 pages : illustrations (chiefly color), color maps ; 26 cm
text txt rdacontent
cartographic image cri rdacontent
still image sti rdacontent
unmediated n rdamedia
volume nc rdacarrier
Grade 4 to 6.
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. -- Provided by publisher.
Includes bibliographical references and index.
Bye-bye butterflies? -- The mysterious monarch migration -- Monarchs in trouble -- Bringing the monarchs back -- Butterflies on the brink.