Mysteriously Maned Female Lion Has Died at Oklahoma City Zoo - NBC 10 Philadelphia
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Mysteriously Maned Female Lion Has Died at Oklahoma City Zoo

Last month, the zoo said Bridget appeared to be in good health after lab results explained why she had grown a mane

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    Mysteriously Maned Female Lion Has Died at Oklahoma City Zoo
    Amanda Sorenson/Oklahoma City Zoo via AP
    These photos provided by the Oklahoma City Zoo taken, March 25, 2017, left, and Nov. 23, 2017, right, show Bridget, a lioness that has grown a mane. The zoo says a blood sample has detected the reason why one of its African lionesses has grown a mane.

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

    The zoo says the lioness, named Bridget, was euthanized Wednesday after a veterinary team determined she was likely suffering from heart failure or infection. The zoo says 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 says that suggested a benign tumor in an adrenal gland may have been the cause.