Denver Zoo Turns 130: It All Started With One Bear and a Cage in City Park

Feb 26, 2026, 8:13 AM | Updated: 8:17 am

You might think the Denver Zoo was dreamed up in some grand civic plan, complete with blueprints and big speeches. Nope. It started because there was a bear that needed a home.

In a video for the City of Denver’s “I Am Denver” project, Brian Aucone, senior vice president of animal sciences, said it plainly: “There was a bear that needed a home.” That bear was a black bear named Billy Bryan, given as a gift to Denver’s mayor back in 1896. Because that’s apparently a normal thing you could do in the 1890s.

Billy Bryan was built a cage in City Park, where visitors could come see him. He had one keeper, and since the space wasn’t officially a “zoo,” record-keeping was, let’s say, not exactly robust. As in, there isn’t much information left about Billy Bryan because documentation was lax at the time.

Still, his arrival kicked off what eventually became the Denver Zoo, now celebrating its 130th year. After Billy Bryan, more animals were added, including waterfowl, deer and bison.

And here’s the part that’s actually pretty wild: Denver Zoo was the first in North America to build real animal habitats instead of just cages. You know, the kind of setup basically every modern zoo uses now. So, yes, it started with one bear in a park, and ended up helping change how zoos work across the continent.

Colorado News

(Photo by Michael Ciaglo/Getty Images)...

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Denver Zoo Turns 130: It All Started With One Bear and a Cage in City Park