Introduces animal migration and why some animals migrate, including the zebras in Botswana, the red crabs of Christmas Island, and the walruses in the Bering and Chukchi Seas.

Examines several animals and their great migrations, ranging in size from the army ant to the sperm whale.

Introduces sperm whales, including their different body parts, how they travel in groups, what they eat, and how they care for their young.

Originally published in 1950, this is a comprehensive account of the peaks and troughs of migrations to America, beginning with its original formation of the nation through to the influx of Displaced Persons. Relating the American migrations to great movements in world history on the one hand, and to the national ideal of freedom on the other, the author discusses national and cultural migrations specifically-the French, Dutch, Norwegians, Swedes,...