This book offers a rigorous academic examination of the development of animal behaviour, focusing on the biological, genetic, and cognitive foundations that shape behavioural patterns across species. It explores how inherited traits, physiological differences, and neurological processes influence behaviour from early development through maturity. The discussion integrates perspectives from animal science and behavioural biology to explain variation in behaviour related to sex, communication, cognition, and emotional response. By analysing behavioural development within an evolutionary framework, the book demonstrates how adaptation, survival, and environmental interaction guide behavioural change over time. Attention is also given to lifespan-related behavioural differences, highlighting how ageing processes vary across species and influence learning, social interaction, and behavioural stability. The book presents a balanced and evidence-based approach, combining theoretical understanding with observational insights drawn from comparative animal studies.

The second part of the book concentrates on interpretative and applied dimensions of behavioural development. It examines how scientific understanding of animal behaviour informs animal welfare, conservation, and ethical decision-making. Emphasis is placed on recognising behavioural complexity and cognitive capacity in animals. Designed for students and researchers, the book provides a clear UK academic perspective on the scientific study of animal behaviour within contemporary biological and environmental research contexts.