
ACKNOWLEDGMENT 
Note: The biological phases of this study were planned under 
the direction of Joseph P. Linduska, formerly head of the 
Wildlife-Insecticides project and now Assistant Chief of the 
Branch of Wildlife Research, and Arnold L. Nelson, Director 
of the Patuxent Research Refuge. The cooperation of numerous 
individuals and agencies made this project possible, particularly 
that of Henry E. Whitley, manager of the Brigantine National 
Wildlife Refuge, Robert T. Mitchell, and others of the Patuxent 
Research Refuge staff who assisted in many ways in the preparation 
of this report. Assistance in various phases of the field studies 
was given by Emerson Hibbard, Robert C. Van Etten, and William C, 
Good of the Patuxent Research Refuge. 
This publication was reviewed and edited by Dr. A. C. Martin. 
