The Tracker's Diary: Bears of Katmai

Every fall in the northern Pacific, up to a million salmon migrate back to the rivers and streams where they were born to spawn. Many of these streams are located in Katmai National Park, Alaska.

The crew heads inland to a section of the river to observe the many different families as they fish. Along their path, they have an intimate encounter with a mom and her three cubs.

Everyone hates biting insects, but if people were to look a little closer, they would be able to see that even the tiniest and most irritating bug can be essential for a working ecosystem.

After seeing a wolf in the distance and tracks on the shore, the crew head inland in search of more clues to the wolf's whereabouts. They encounter a familiar bear family on their way and decide to follow them to a local fishing spot.

Casey and the crew go out in search of the family of the lost cub from the previous night. They hope that if they are able to find the cubs family, the cub will have been able to find them as well.

As the end of their expedition draws near, it appears the salmon and bear activity are beginning to decline. However, this does not mean that there aren't some bears still lingering in the surrounding areas.