This volume serves as the foundational reference work for identifying and understanding the avian species found across the Indian subcontinent. Salim Ali, a preeminent ornithologist, and S. Dillon Ripley compiled this comprehensive survey to document the distribution, habits, and physical characteristics of birds in India, Pakistan, Bangladesh, Nepal, Bhutan, and Sri Lanka. The text utilizes rigorous taxonomic classification and field observation data to provide a systematic account of species ranging from divers to hawks.

Experts and ornithologists recognize this series as the definitive, foundational text for South Asian avian studies. Readers frequently note the academic density and technical precision of the entries, which remain standard references for researchers in the field.