HOHENWALD, TN (CBS) – A 50-year-old elephant formerly in the care of the Philadelphia Zoo has passed away.

The Zoo and The Elephant Sanctuary shared the sad news on Dec. 23rd.

According to officials, Dulary, an Asian elephant who resided at the Philadelphia Zoo from 1964 until her move to Tennessee’s The Elephant Sanctuary in 2007, passed away on Monday morning.

Though Dulary had experienced intermittent health issues, zoo workers say she had happily celebrated her 50th birthday this past May. They also say there had been no indications Dulary was ill the night before her death.

While it’s unclear what killed the elephant, The Elephant Sanctuary said she passed away peacefully and was “surrounded by those who loved her,” including her best elephant friend, Misty.

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