Four male and seven female opossums (Trichosurus vulpecula) marked in the Orongorongo Valley, Wellington between 1956 and 1962 were recaptured in the same 16 ha (40 acres) of indigenous forest between 1966 and 1970. Their ages of 5 years 9 months to 12 years 3 months are thought to be the greatest recorded for free-living animals. Five of the seven females were fertile, and one gave birth in each of four years when aged 9, 10, 11 and nearly 12 years. Only the oldest female, in her 12th year when caught in 1966, definitely failed to breed.
|Secondary title||Journal of the Linnean Society of London (Zoology)|