Female lion with a mane has died at Oklahoma City Zoo

OKLAHOMA CITY – The Oklahoma City Zoo said an 18-year-old African lioness that mysteriously sprouted a mane last year has died.

The zoo said the lioness, named Bridget, was euthanized Wednesday after a veterinary team determined she was likely suffering from heart failure or infection. The zoo said Bridget had been lethargic, not eating and appeared to be in pain.

Last month, the zoo said Bridget appeared to be in good health after lab results explained why she had grown a mane, which is usually only seen on male lions.

The testing found that Bridget had an elevated level of androstenedione, a hormone that can contribute to developing male features. The zoo said that suggested a benign tumor in an adrenal gland may have been the cause.