This work investigates the biological diversity and identification of the native and introduced amphibian and reptile species inhabiting New Zealand. Joan Robb, a respected zoologist, utilizes her extensive field research and academic background to provide a systematic overview of these often-overlooked fauna. The text serves as a foundational reference, synthesizing morphological data and ecological observations to assist researchers and naturalists in species classification.

The text is regarded as a foundational, specialist reference for those studying the unique herpetological landscape of New Zealand. Its systematic approach and reliance on visual identification markers make it a standard resource for regional naturalists and academic researchers alike.