The second of three films penetrating the truly wild places of North America visits the arid Californian peninsula of Baja, a finger of land pointing down the west coast of Mexico, almost enclosing the fertile Sea of Cortez.

The sea is home to a myriad species, from the microscopic to huge manta rays. On its islands nest such exotic birds as the blue-footed boobies, while sea-lions rest between fishing trips.

On the peninsula itself, kangaroo rats emerge at night to hunt for food, while they in turn are the prey of speckled rattlesnakes and over 60 species of scorpion. And amid the cactus forests are to be found Costa's hummingbirds and cactus mice.