THE NATIONAL ACADEMIES PRESS

500 Fifth Street, NW Washington, DC 20001

NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The members of the committee responsible for the report were chosen for their special competences and with regard for appropriate balance.

This study was supported by the U.S. Department of Agriculture, Agricultural Research Service (USDA-ARS) under Award No. 59-0790-3-201 and the U.S. Geological Survey (USGS) under Grant Agreement No. 03HQGR0131. The content of this publication does not necessarily reflect the views or policies of the USDA-ARS or USGS, nor does mention of trade names, commercial products or organizations imply endorsement by the U.S. Government.

International Standard Book Number-13: 978-0-309-10289-6 (Book)

International Standard Book Number-10: 0-309-10289-8 (Book)

International Standard Book Number-13: 978-0-309-66381-6 (PDF)

International Standard Book Number-10: 0-309-66381-4 (PDF)

Library of Congress Control Number: 2006940682

Additional copies of this report are available from the

National Academies Press,

500 Fifth Street, NW, Lockbox 285, Washington, DC 20055; (800) 624-6242 or (202) 334-3313 (in the Washington metropolitan area); Internet, http://www.nap.edu.

Copyright 2007 by the National Academy of Sciences. All rights reserved.

Printed in the United States of America.

Cover: Design by Van Nguyen. Photo credits clockwise from top left: hummingbird by W. May; sphinx moth by W. May; bat by Merlin D. Tuttle, Bat Conservation International, reprinted with permission; bee by David Inouye, University of Maryland, College Park.



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement