original: captive longevity is 20 to 30 years , with rare accounts of over 40 years , reports of a individual living to 40 years in philadelphia zoo .
simplifications: captive life expectancy is usually 20 to 30 years . however an individual lived to 40 in the philadelphia zoo captive life span is 20 to 30 years , with rare accounts of over 40 years , reports of a individual living to 40 years in philadelphia zoo . captive longevity is 20 to 30 years , with rare accounts of more than 40 years , reports of a person living to 40 years in philadelphia zoo . captive longevity is 20 to 30 years , with rare accounts of over 40 years , reports of an individual living to 40 years in philadelphia zoo . life expectancy when caged is 20 to 30 years , with rare reports of over 40 years , it is reported an individual living up to 40 years in philadelphia zoo . 1 . captive longevity is 20 to 30 years , with rare accounts of over 40 years , reports of a individual living to 40 years in philadelphia zoo . captive life span is 20 to 30 years , with rare accounts of over 40 years , reports of a individual living to 40 years in philadelphia zoo . in captivity they generally live 20 to 30 years , with rare reports of animals living over 40 years including one in the philadelphia zoo .