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This third edition of the Field Guide to the Frogs of Borneo introduces the non-specialist reader to the diverse frog fauna of Borneo, found in habitats ranging from the island’s low coasts to near the summits of its highest mountains. More than 180 species of frogs have now been found on the island and the number continues to grow. The current book contains significantly revised and expanded natural history information on Bornean frogs some of it previously unpublished, and detailed accounts for all species currently known. The success of field identifications has been enhanced by addition of new keys to species under each genus, concise morphological descriptions, ecological notes, and high-resolution images. Geographical information has also been included for all species presented. Contributions by many expert photographers and assistance by other herpetologists has greatly enhanced the value of this book as a reference for the Bornean frog fauna.
As of March 2016, 183 species of frogs have been found to occur in Borneo. The exact number is uncertain because new species are discovered every year. Just 50 years ago when the fi rst comprehensive review of the frogs of Borneo was published there were only 92 species on the list, so the number has doubled during that interval. Thirty-three new species have been described as new since the last edition of this field guide. About 20 previously undescribed species have been added to the list of Bornean frogs since 2010. The number of new species continues to rise, and we can only guess how many more remain to be found. It would not be surprising if the total number of species eventually exceeds 200. Thus, for this third edition of the book, we welcome new colleagues who have made their own signifi cant contributions to the knowledge of the identities, distribution and abundance of the island’s frog fauna. All of us have enjoyed our days in Borneo’s wonderful forests, and are especially grateful for the generosity and the kindness of all the friends whom we have come to know these past years.