r e u v e n d u k a s is associate professor of psychology, neuroscience,
and behavior and a member of the Animal Behavior Group at McMaster
University.
j o h n rat c l i f f e is a postdoctoral fellow at the Center for Sound
Communication at the Institute of Biology of the University of Southern
Denmark.
The University of Chicago Press, Chicago 60637
The University of Chicago Press, Ltd., London
© 2009 by The University of Chicago
All rights reserved. Published 2009
Printed in the United States of America
18 17 16 15 14 13 12 11 10 09 1 2 3 4 5
i s b n-13: 978-0-226-16935-4 (cloth)
i s b n-13: 978-0-226-16936-1 (paper)
i s b n-10: 0-226-16935-9 (cloth)
i s b n-10: 0-226-16936-7 (paper)
Library of Congress Cataloging-in-Publication Data
Cognitive ecology II / edited by Reuven Dukas and John M. Ratcliffe
p. cm.
Includes bibliographical references and index.
i s b n-13: 978-0-226-16935-4 (cloth : alk. paper)
i s b n-13: 978-0-226-16936-1 (pbk : alk. paper)
i s b n-10: 0-226-16935-9 (cloth : alk. paper)
i s b n-10: 0-226-16936-7 (pbk : alk. paper)
- Cognition in animals. 2. Animal ecology. 3. Animal behavior—
Evolution. I. Dukas, Reuven. II. Ratcliffe, John M.
ql785.C512 2009
591.5'13—dc
2009016599
a The paper used in this publication meets the minimum requirements
of the American National Standard for Information Sciences—
Permanence of Paper for Printed Library Materials, a n s i z39.48-1992.