Darrel Frost of the American Museum of Natural History provides extensive assistance on taxonomic and nomenclatural issues to the GAA, without which it would be much more difficult to implement the assessment and keep up to date with taxonomic changes. David Wake of the Museum of Vertebrate Zoology at the University of California at Berkeley gave us privileged access to the AmphibiaWeb database to help us with the initial data collection process, and continues to be an adviser to the central coordinating team. We are most grateful to both of these people for their unfailing support.

We have received assistance and advice in ways too numerous to mention from the IUCN/SSC Declining Amphibian Populations Task Force (DAPTF), in particular from Tim Halliday, Jim Collins, Jim Hanken, John Wilkinson and Jeanne McKay.

The following people have provided local logistical support for GAA workshops: Jean- Marc Hero (Australia), Zhong Shengxian (China), Barasa Johnson (Kenya), Sanjay Molur and Sally Walker (India), Rosa Mary Saengsanthitham (Thailand), Enrique Lahmann (Costa Rica November 2002), Sabrina Cowan and Allen Allison (Hawaii), Adriano Paglia, Jose Maria Cardoso da Silva and Luis Paulo de Souza Pinto (Brazil), Paul and Sara Salaman and José Vicente Rodriguez (Ecuador), Doreen Zivkovic (Switzerland), Esteban Lavilla (Argentina), Juan Carlos Ortiz (Chile), David Gower and Mark Wilkinson (UK), Sixto Inchaustegui (Dominican Republic), Sonsoles San Román and Jamie Skinner (Spain), Antonio Muñoz and Nora Patricia Lopez León (Chiapas salamander workshop), Federico Bolaños, Yolanda Matamoros and Jorge Rodríguez (Costa Rica August 2007). We also thank Craig Hilton-Taylor, Sanjay Molur, Bob Inger, Arvin Diesmos, Matt Foster, Mike Hoffmann, Penny Langhammer, Don Church, David Knox, Meghan McKnight and John Lamoreux who assisted in facilitating working groups during GAA workshops.

The participants of the 2007 salamander workshop held in Chiapas, Mexico, should be especially thanked for voluntarily paying for their own hotel rooms for the two days of the workshop when insufficient funding had threatened to cancel the workshop.

Richard Berridge has voluntarily given time to this project and assisted with substantial editing and proof-reading of species accounts, as well as other general assistance for which we are extremely grateful. John Pilgrim also worked diligently on adding new amphibians described since the first release of the data in 2004 and the first update in 2006, including creating range maps for each of these species. Pavaritha Ramani did a fantastic job collating photographs for the Threatened Amphibians of the World book, and also providing other support to the coordinating team in her time as an intern with us. Ariadne Angulo has been a fantastic addition to the team in 2007/08 and has been responsible for many of the new species added since 2006 and other updates to the data particularly for the Neotropics.

NatureServe have very generously hosted the GAA website for four years from 2004 to 2008, and each year have worked tirelessly to update the information so that it can remain current. Bruce Stein has been instrumental in making this happen and we are indebted to Leslie Honey and her team (Felicia Carr, Jason McNees, Karen Monroe, Larry Prikockis, and Ekourba Yeboah) for doing such a great job during this time.

Gustavo Fonseca, Claude Gascon, Don Church, Russell Mittermeier, Tom Lacher, Tom Brooks, Larry Master and Georgina Mace have provided guidance and encouragement, and we wish to express a special debt of gratitude to them. We are particularly thankful to Ana Rodrigues for her advice on statistical analyses. Rob Waller, Debra Fischman, and Mark Denil provided extensive, high-quality GIS support to the central coordinating team in 2004, and since then Vineet Katariya has single handedly taken on this role and done an excellent job. Jim Ragle and Vineet Katariya have also provided great support for the Species Information Service (SIS) database. Xie Feng provides invaluable assistance in many ways, and in particular by helping us with the Chinese data, and giving us access to scientific literature in Chinese. Don Church and Allison Parker did a very large amount of work locating missing bibliographic references for the database in 2004 and entering them into the database. Noura Bakkour, Laara Manler, Caryn Simmons and Andrew Mitchell have contributed logistical and administrative support to the central coordinating team in the past, and at present Sarah Wyatt is excelling in this role.

The majority of the distribution maps used for US species in the GAA in 2004 were adapted from distribution data and maps assembled at Ball State University by Priya Nanjappa, M.S., Laura M. Blackburn, M.S. and Michael J. Lannoo, Ph.D. Development of the "United States Amphibian Atlas Database" was supported in part by grants and/or matching funds from the National Fish and Wildlife Foundation, United States Fish and Wildlife Service, and Disney Wildlife Conservation Fund.