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    The road linking West Thumb and Old Faithful is closed for the season—traffic should detour through West Thumb, Lake, and Canyon. The road from Mammoth to Norris is closed for two weeks—traffic should detour over Dunraven Pass. More »

Episode 4: The Generation of the Wolf




Bone marrow – Soft tissue in the hollow interior of bones. In adults, bone marrow in large bones produces new blood cells. Bone marrow composition is one way that biologists can study what the health of an animal was when it died.

Ecosystem – A dynamic complex of plant, animal, and micro-organism communities and their non-living environment interacting as a functional unit.

– Acronym for Global Positioning System. GPS is a network of Earth orbiting satellites that transmit precise radio signals, enabling a GPS receiver to determine location, speed and direction.

Predator – An animal that kills other animals as a source of food.

Rendezvous – An area within a wolf pack's territory where pups are temporarily left when they are too young to join the pack in hunting.

Telemetry – A technology that involves wireless transmission of signals. In Yellowstone, biologists use telemetry as a tool to study wolf movement and behavior. Some wolves have radio collars that transmit a signal at a particular frequency. By tuning a receiver to the frequency of a particular wolf’s radio collar and then aiming their receiver’s antenna in different directions, biologists can locate collared wolves.


More Information

Yellowstone's main web page for information about wolves, including a map of current wolf territories.

Information on the Yellowstone wolf reintroduction efforts.

Winter 2005 issue of the journal "Yellowstone Science." This issue is devoted to Yellowstone's wolves. Please note: This is a pdf file that will automatically download to your computer.

A history of the gray wolf, from the U.S. Fish and Wildlife Service.

Endangered Species Act information about the gray wolf, including press releases and fact sheets, from the U.S. Fish and Wildlife Service.

News, information and recovery status reports about gray wolf restoration in the Northern Rocky Mountains, from the U.S. Fish and Wildlife Service.

General information about gray wolves, from the International Wolf Center.

Kid-friendly fact sheet about wolves, from the Defenders of Wildlife.

A field guide to the gray wolf, from the National Wildlife Federation

Did You Know?

Fire in Yellowstone Pineland in 1988

The 1988 fires affected 793,880 acres or 36 percent of the park. Five fires burned into the park that year from adjacent public lands. The largest, the North Fork Fire, started from a discarded cigarette. It burned more than 410,000 acres.