World’s Oldest Known Desert Bighorn Sheep Dies in Bakersfield at CALM Zoo at Age 20 After Becoming a Beloved California Landmark

BAKERSFIELD, CA — CALM Zoo in Bakersfield has announced the death of Sierra, a desert bighorn sheep it described as the oldest known living desert bighorn sheep in the world. Sierra died at age 20, closing a remarkable chapter for one of the zoo’s most recognizable animals.

The zoo shared the news on Facebook and included a photo of Sierra, who had become a familiar presence for visitors and staff. Her long life made her stand out well beyond Kern County, giving the California animal a rare distinction among desert bighorn sheep.

How Sierra Became So Remarkable

Desert bighorn sheep are known for living in tough, dry landscapes, so reaching 20 years is unusual. CALM Zoo said Sierra held the title of the oldest known living desert bighorn sheep in the world, a detail that helped make her a local favorite and an animal of broader interest.

The announcement did not include details about where Sierra came from or how long she lived at CALM. It also did not say what led to her death. Even so, the simple facts of her age and her record-setting status were enough to make the news feel special to many who followed the zoo.

A Familiar Face For Visitors

For zoo guests, animals like Sierra often become part of the experience in a way that goes beyond a quick stop at an enclosure. A creature with a story, a name, and a record attached to it can leave a lasting impression, especially when it has been around for years.

CALM’s Facebook post framed Sierra as more than just another resident. By calling attention to her age and unique standing, the zoo underscored how rare it is for a desert bighorn sheep to live so long. That makes her death notable not only for the zoo, but also for animal lovers who appreciate unusual wildlife milestones.

Why Her Story Stood Out

Stories about animals with extraordinary longevity tend to catch attention because they blend science, nature, and personality. Sierra’s case did exactly that. She was not presented as a headline-making celebrity in the usual sense, but as a record holder whose age made her genuinely unusual.

Her death also highlights how zoos can become caretakers of animals that help people learn about species they might otherwise never encounter closely. For CALM, Sierra’s legacy is tied to that kind of connection: a desert bighorn sheep that lived long enough to become part of the zoo’s identity and a small piece of California wildlife history.

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