The book is arranged geographically. Beginning in Siberia, Mr. Matthiessen takes through Asia to Australia and then on to Africa and Europe and finally to North America. There are no cranes in South America (or Antarctica).
The author is at his best when he is combining his wry observations of the people and places around him with an enthusiastic and well-informed account of the natural history of a region. I felt that he was less successful when he lets his righteous indignation get the better of him and begins to make snide comments about the absence of a love of the natural world in Chinese society, the wrong-headedness of various bureaucrats and the corruption of local officials.
It is not as if I disagreed with his point of view, but I knew that I already shared it before I even picked up the book. I can't imagine anyone who had any doubts about the importance of cranes as sensitive indicators of the general health of the environment being won over to the crane's side by this hectoring, doctrinaire authorial voice. But then, perhaps this books is really just an extended love letter to the cranes and to the environment in general. As such, it succeeds wonderfully.