Grizzly bear walking through snow with aspen trees behind.
Grizzly Bear in Snow


Wildlife is never far in Grand Teton National Park. High in the mountains, a yellow-bellied marmot whistles a warning as a golden eagle soars above. Searching for insect larvae, a black bear rips into a rotten lodgepole pine log. On the valley floor, a herd of bison graze as a coyote trots through the sagebrush, looking for a meal. Along the Snake River, an osprey dives into the water with talons extended, rising with a cutthroat trout. In a nearby meadow, a moose browses the tender buds of willows growing in this rich environment.

Animals are interconnected. They relate to and shape the environment where they survive. Some of these relationships are obvious, while others are less so. These relationships and connections cross park boundaries. Grand Teton National Park's 310,000 acres lie at the heart of the Greater Yellowstone Ecosystem. The Greater Yellowstone Ecosystem encompasses over twenty million acres and is considered one of the few remaining, nearly intact, temperate ecosystems on Earth. The animals inhabiting Grand Teton National Park depend on this vast area for survival, residing in and migrating to different areas depending on the season.


Greater Yellowstone Inventory and Monitoring Network

The Greater Yellowstone Inventory and Monitoring Network (GRYN) is one of 32 NPS inventory and monitoring networks created to provide oversight, planning, and consistency in monitoring the long-term health of the nation's parks. The parks of the GRYN include Yellowstone National Park, Grand Teton National Park, John D. Rockefeller, Jr. Memorial Parkway, and Bighorn Canyon National Recreation Area.

Bull elk preparing to bugle with head and antler raised. Standing in dried grasses near a lone tree.

The World of Mammals

Bull elk preparing to bugle.

Three tall, gray sandhill cranes walking through dry grass. Two adults behind a juvenile in front.

Over 300 Bird Species

Sandhill Cranes

Yellow and black swallowtail butterfly that has landed on a yellow composite flower.

The Small and Mighty

Swallowtail Butterfly

Woman spraying bear spray while man with boy stands in sagebrush behind.

Wildlife Safety

Bear Spray Usage

Last updated: April 9, 2020

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Contact Info

Mailing Address:

P.O. Box 170
Moose , WY 83012


Talk to a Ranger? To speak to a Grand Teton National Park ranger call 307–739–3399 for visitor information Monday-Friday during business hours.

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