This volume serves as a comprehensive identification guide designed to assist observers in cataloging and understanding the diverse avian species native to New Zealand. R. A. Falla, a distinguished naturalist and ornithologist, utilizes his extensive field experience to organize taxonomic data and behavioral observations. The text provides a structured framework for identifying birds through physical descriptions, habitat preferences, and geographical distribution patterns across the islands.

The work is regarded as a foundational reference for regional ornithology, valued for its systematic approach to species identification. Its technical clarity and focus on observable characteristics make it a standard resource for both amateur birdwatchers and professional naturalists.