One of the red pandas at Utah’s Hogle Zoo has died after a recent, sudden decline in her health.

The zoo announced Saturday that Priya, a female red panda, passed away. They said she had recently been placed under “veterinary advisement,” then over a few days went into critical condition. She was then taken to the intensive care unit at a local veterinarian care center. She was there for about three days under 24-hour “unprecedented levels of critical care” before her passing, the zoo said.

Priya was five years old. Red Pandas’ average lifespan is 8-10 years in the wild and 15 years in zoos, according to the Red Panda Network.

A necropsy was conducted, and the zoo said its animal health team is working to determine the cause of Priya’s death.

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