frog quiz home | frog call lookup | acknowledgements


This application is hosted and maintained by USGS Patuxent Wildlife Research Center in Laurel, Maryland. We dedicate the Frog Call Quiz website to our frog call survey volunteers. USGS thanks the following individuals and organizations for their contributions to the development of this website.


We are grateful to U.S. Environmental Protection Agency (EPA) and USGS Status & Trends of Biological Resources Program for providing support for the development of the Frog Call Quiz website and database. Thanks also to the USGS Amphibian Research and Monitoring Initiative (ARMI) for providing additional financial support.


All images are used by permission. We thank the following photographers for the use of their photos:

Louise Bowie
Isaac Chellman
Lindsay Funk
U.S. Fish & Wildlife Service

Sound Files

All sound files are used by permission and are copyright protected materials. Special thanks to Lang Elliott of NatureSound Studio for permission to use his recording collection, which gave us most of the eastern frogs and toads. In addition we thank the following people for allowing us permission to use their recordings and by doing so permitted us to create a more challenging quiz:

Dave Golden
Joe Mitchell
Steve Shively
Bob Thomas
Tom Tyning
Hardin Waddle
Zack Walker
Mark Watson
Jim White
Andrew Wood


We thank the following people for contributing their time and effort to help insure the quiz functions. Their efforts helped to improve the quiz.

Andrea Hardy Campo
Jacoby Carter
Paul Conzelmann
Terry Custis
Janet Eastridge
Shonda Foster
Dave Golden
David Gurney
Donata Henry
Wayne Hildebrand
Michael Jenkins
Liz McDowell
Holly Niederriter
Anna Ott
Lori Sargent
Michael Schenk
Steve Shively
Bob Thomas
Missy Toncray
Maria Vaccio
Glenn Welch
Mark Wimer
Ann Wing

Other credits

Jang Byun, Amy Goodstine, Bruce Peterjohn, Linda Weir, and Mark Wimer were involved in the initial concept design and database development. National Wildlife Federation staff members (Erik Giberti, Amy Goodstine, and Stephanie Eskins) and USGS staff members (Jang Byun, Lois Loges, Linda Weir, Lisa Whitman, and Mark Wimer) assisted with a variety of technical support issues. Shonda Foster and Lindsay Funk assisted with the development of frog call combinations to be created. Quiz content was written by Amy Goodstine and Linda Weir.

Heron Media edited original sound files and converted them to streaming audio format. PerformTech edited and merged sound files and converted them to streaming audio format. Lori Erb, Shonda Foster, Margaret Gunzburger, and Linda Weir reviewed sound files. WebLinc produced the database and associated web application. We thank Jacoby Carter and Addison Wynn for assisting with sound file acquisition. We thank members of Partners in Amphibian and Reptile Conservation (PARC) for assistance with sound file acquisition and quiz testing.

southern leopard frog