This volume serves as a comprehensive identification manual for the avian species inhabiting the islands of New Zealand. The authors, Falla, Sibson, and Turbott, utilize their extensive ornithological expertise to provide a structured framework for bird identification, incorporating physical descriptions, behavioral notes, and geographical distribution data to assist both amateur birdwatchers and professional researchers in the field.

This work is regarded as a foundational reference for regional ornithology, providing a dense and methodical approach to species identification. Its systematic structure and focus on observable traits make it a standard resource for those studying the unique avian biodiversity of the New Zealand archipelago.