You can’t come to Yellowstone without thinking about the grizzly bear. This thriving ancient ecosystem is like a sacred space for them. And a critical source for food which they are constantly in search of in order to get the needed calories that will sustain them through their long winter sleep.

But what many grizzly bear lovers might not think about are the fish at the heart of the bear feeding frenzy. Yellowstone has the largest high elevation lake in North America, and under the surface, a fight is going on between the native cutthroat trout and the invasive lake trout. And for a long time the invasive lake trout have been winning the battle, throwing the whole lake’s food chain into disarray.

On today’s episode, Chris visits Yellowstone to see how scientists are turning an ecological disaster into a rare invasive species success story, and how the beloved Yellowstone grizzlies are faring amongst this drama.

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You can help us continue to create this special immersive storytelling by joining THE WILD Patreon community at www.patreon.com/chrismorganwildlife or donating at kuow.org/donate/thewild. Thank you.

For some great photographs and clips from our journey through the national parks, check out our Instagram @thewildpod and @chrismorganwildlife.

THE WILD is a production of KUOW, Chris Morgan Wildlife, and the NPR Network. This episode was produced by Lucy Soucek, written by Christopher Preston and edited by Jim Gates. THE WILD is hosted, produced and written by Chris Morgan. Fact checking by Apryle Craig. Our theme music is by Michael Parker.

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1200: Daniel Shays Leads a Rebellion

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