Robust insights into the often mind-bogglingly arduous journeys of animals all over the world. - Kirkus Reviews Migration is one of the great mysteries of the natural world. With no engines or GPS devices, birds fly thousands of miles to their African feeding grounds, salmon cross oceans so that they may return to the rivers in which they were born and monarch butterflies spend their entire adult lives traveling from the grasslands of the Midwest to the forests of Mexico. This book takes a close look at how and why different animals migrate. The science of migration and navigation is broken down into clearly understood texts, and then brought to life with beautiful packaging and vivid illustrations by Aquila illustrator, Ed J Brown.