Dodoma, Dec. 29 -- Tanzanian conservation authorities have said that the world's oldest free-ranging female black rhino has died in the Ngorongoro crater aged 57.

Freddy Manongi, the Conservation Commissioner for the Ngorongoro Conservation Area Authority (NCAA), said in a statement on Saturday that the rhino named Fausta died of suspected natural death on Friday, reports Xinhua news agency.

"Records show that Fausta lived longer than any rhino in the world and survived in the Ngorongoro, free-ranging, for more than 54 years before it was kept in a sanctuary for the last three years of its life in 2016," said the statement.

The statement said the rhino was first located in the Ngorongoro crater in 1965 by a scientist from the Universit...