Only 48 bird species regularly nest along the river, while others use the river as a migration corridor or as overwintering habitat.

Maple River is near enough to the James River to be part of the migration corridor for many species of birds.

It covers nearly 310 square miles, including a long mesa that is a crucial section of the migration corridor for pronghorns and mule deer.

Extensive cliffs provide ideal habitat and important migration corridors for raptor species.

The area includes nesting sites, feeding areas and migration corridors of importance to six species of marine turtles.

The results answer basic questions about the animals' biology including where they feed and breed, and what migration corridors they use.

These migration corridors maximise help from the thermals and thus save energy.

Areas known as animal migration corridors are zoned so that animals do not destroy farmland.

In four places, the rugged topography narrows the migration corridor to a few hundred yards.

Because of the aridity, many animal species rely on protected migration corridors during droughty conditions.