This book investigates the enduring phenomenon of bird migration and its historical significance to human societies. Drawing on observations that predate modern calendars, the author explores how the seasonal movements of birds have served as a fundamental marker of time and change. This edition, reproduced from an original William Collins copy, offers a historical perspective on ornithological study.

This work examines the long-standing human interest in bird migration, highlighting its role as an ancient form of natural timekeeping. The book's presentation as a reproduction from an original William Collins edition suggests a focus on historical context and established knowledge within ornithology. Its subject matter points to a text likely aimed at readers interested in natural history and the historical observation of the environment.