Air migration. About a bird Why do birds migrate? Migration routes Preparing for the journey The gliders The flappers Flocks and formations Layover flight Land migration. Large mammals Small mammals Insects Reptiles and amphibians Sea migration. Fish Salmon Eels Diel vertical migration Leatherback turtles Whales Navigating change. The mysteries of navigation and orientation Magnetic migrants Homing in Other factors Migration in a changing world
