Acknowledgments

RCH sincerely thanks the following people for the contributions to this account: Mark Sayre, Curtice Griffin, Scott Melvin for assistance in research study design and conducting field work; Blair Nikula, Laurie MacIvor, Peter Trull, Jeff Russell, William DeRagon, Paul Cavanagh, Ginny Rosenberg, Bob Prescott, Steve Dinsmore, Polly Stevens, John Lortie, Mark Luthman, Lou Hinds, Bill Brokaw for assistance in field. Michael Cadman kindly provided his M.Sc. thesis to EN; Allan J. Baker assisted in design and field work; Brook Lauro contributed unpublished data and commented on the account. Ann Rivers and Chris Risley assisted EN in the field. Cynthia and Edward Risley provided accomodation to EN and the Wallops Island Flight Center (NASA) kindly gave permission to work on Wallops Island, VA. Charles Vaughn provided historical data and logistical help on Wallops Island. Appearance section written by Chris Thompson.

Data from Massachusetts were collected from 1984–1987 with logistical support from the U.S. Fish and Wildlife Service, and the University of Massachusetts, Amherst. Data from Virginia were collected with financial support from NSERC (Canada) to A. J. Baker, and in Argentina with support from a Frank M. Chapman Memorial Fund grant to EN.