A brief video discussing the differences between Black Bears and Grizzly Bears. The video describes how to identify one from the other.

Yellowstone National Park: The history of human-bear interactions involving food at Yellowstone are covered in this video. The reasons why visitors are currently discouraged from feeding bears at the park are discussed as well.

Yellowstone National Park: This video covers both native and invasive species of trout that are found in the waters at Yellowstone. The physical characteristics of each of the five species are covered in detail. Cutthroat trout are native and must be released if caught!

Gateway NRA: Park ranger Dave Taft discusses various species of hawks and where they can be spotted in the Gateway National Recreation Area.

Natural Laboratory: Where have all the black abalone gone? How are scientists surveying the remaining population? Why are black abalones eating so much? Tune in for answers to these and related questions.

Natural Laboratory: Due to higher carbon dioxide output, the oceans have become increasingly acidic. How is this acidity affecting marine organisms with shells? Tune in to find out.

Natural Laboratory: Tune in to find out how deep-water corals are beneficial to an array of different marine organisms and the factors that could harm the corals. Information is provided by experts at the Cordell Bank National Marine Sanctuary.

Natural Laboratory: This audio file covers attracting great white sharks to boats so that they can be documented and tagged. They types of tags used are discussed as well as the migration patterns of the great white sharks found off the California coast.

Natural Laboratory: Why are populations of native Olympia oysters in Tomales Bay not recovering although they have not been harvested for nearly a century? Tune in to find out.

Natural Laboratory: What is being done to restore the population of tidewater gobies in the Tomales Bay watershed? Tune in to find out.

Natural Laboratory: Listen to this audio file to learn about Humboldt squid. In recent years these squids have been frequenting waters off of the California coast. Biologists search for the reason behind this unusual behavior.

Natural Laboratory: What pollutants are present in harbor seals, how do the seals absorb these pollutants, and what testing is conducted to determine the level of contamination of the seals? Tune in to find out.

Natural Laboratory: Join the search for one of the ocean’s great hunters, the white shark. Learn how these sharks are tracked in the northern Pacific Ocean and what the aims of the current research are.

Natural Laboratory: Tune in to learn about tracking Coho salmon and other fish species through electrofishing.

Yellowstone National Park: This video contains many interesting details about the wolves at Yellowstone National Park. The monitoring project of the wolves at the park is discussed as well as the wolves’ interactions with other animals, such as elk, bison, and bears.

Everglades National Park: Be a part of a survey of invasive Burmese pythons in the Everglades with Dr. Michael Dorcas. Dr. Dorcas discusses how Burmese pythons are likely adversely affecting native species in the Everglades.

Hawai'i Volcanoes NP: This is a video dedicated to the Hawaiian Petrel, or `U`au. The life cycles of these seabirds is discussed along with reasons they are threatened by extinction and what the park is doing to protect them.