This book is available as a high quality PDF on the Herpetological Conservation International website.
Aquatic Snakes, Diversity and Natural History covers about 420 snake species with text written by over a dozen co-authors and images supplied by about 120 photographers. The book is currently available as a PDF and will eventually be available as a hardcover book.
This volume is perhaps best considered an illustrated, annotated checklist of aquatic and semi-aquatic snakes in marine and freshwater environments. The biggest challenge was deciding what species to include and which to exclude. While the intent was to have accounts for all aquatic snakes, where do you draw the line on the continuum? How much evidence do you need to label a species semi-aquatic? I am confident this volume covers the range of
snakes traditionally considered semi-aquatic. However, knowledge of some of these animals is poor or absent, while others are some of the best-studied reptiles.
Here are some sample pages.
