Also, keep in mind that being captured on film is far less stressful than being physically captured, and that a good photo often suffices for identification purposes. Nevertheless, some species must be caught for positive identification. To this end we are in the process of collecting photographs of the amphibians found throughout the United States and Canada. This guide provides a brief description of each species along with several pictures of each to display the different color morphs and patterns. When appropriate, tips are given to help separate very similar species.
Line drawings are also available to help explain some of the terminology used.
Range maps show approximately where each species may be found, but be aware that amphibians are not uniformly distributed throughout this area. Naturally, maps small enough to fit on your monitor's screen can not show much detail. Also, many species have special habitat requirements and all amphibians are more or less dependent on sources of moisture. Some regions have been poorly studied as well, and large portions of the ranges shown in these areas are extrapolations from only a few records. In addition, you should consider obtaining a field guide if you are interested in learning more about amphibians and identifying them on your own.