GREAT BEND, Kan. (KAKE) - A Kansas zoo says it beloved bald eagle that had lived there for over 44 years has died.

The Great Bend-Brit Spaugh Zoo said staff noticed two weeks ago that the eagle, Mrs. B, was not behaving like herself and she was moved inside for testing. 

"Results showed some of her blood levels were elevated which could indicate infection, or something more serious, like cancer. Staff treated her through the weekend and tried to keep her eating, but her health continued to decline, so we made the difficult decision to humanely euthanize her this morning."

Mrs. B was one of the oldest, if not the oldest, bald eagle. She lived at the zoo for 44 years and it is believed she was an adult when she arrived. That would likely make her at least 49 years old, the zoo said. 

"Mrs. B came to the zoo through the Raptor Rehabilitation program in 1979. She had an injury to her left foot that made it difficult for her to be able to hunt properly, so she was given a permanent home here at the zoo."

Per federal regulations, she will be submitted to the National Eagle Repository.