How Do Birds Find Their Way?
The most interesting phase of the movement of animals from place to place is found in the flight of birds during the spring and fall. In the spring the birds come north and in the fall they go south. This is called “migration” and the reason given for the ability of some birds to come back every year to build a nest in the same tree is usually attributed to the “instinct of migration,” and yet that is more a statement of fact rather than an explanation of the wonderful ability of the birds to do this.