<p>Toby, the world's oldest white rhino, has died at the age of 54 in a zoo in northern Italy, a spokeswoman for the establishment said Tuesday.</p>.<p>"Nonno Toby" (Grandpa Toby) passed away on October 6, Elisa Livia Pennacchioni of the Parco Natura Viva, a zoo near the northern city of Verona, told AFP.</p>.<p>"He collapsed on the floor on the way back to his nighttime shelter, and after about half an hour, his heart stopped," she said.</p>.<p>Toby will be embalmed and put on display at the MuSe science museum in Trento, where he will join Blanco, a white lion from the zoo who died five years ago, Pennacchioni said.</p>.<p>White rhinos normally live up to 40 years when held in captivity, and up to 30 years in the wild, she said.</p>.<p>Toby's death, which follows the passing of his female partner Sugar in 2012, leaves the Parco Natura Viva with one remaining white rhino: Benno, aged 39.</p>.<p>Toby was a southern white rhino -- only one of five rhino species that are not considered endangered, with an estimated population of around 18,000, according to the WWF.</p>.<p>However, there are only two examples left of the northern white rhino subspecies who live in Kenya, which are watched round-the-clock by armed guards, the environmental group says.</p>.<p><strong>Watch the latest DH Videos here:</strong></p>
<p>Toby, the world's oldest white rhino, has died at the age of 54 in a zoo in northern Italy, a spokeswoman for the establishment said Tuesday.</p>.<p>"Nonno Toby" (Grandpa Toby) passed away on October 6, Elisa Livia Pennacchioni of the Parco Natura Viva, a zoo near the northern city of Verona, told AFP.</p>.<p>"He collapsed on the floor on the way back to his nighttime shelter, and after about half an hour, his heart stopped," she said.</p>.<p>Toby will be embalmed and put on display at the MuSe science museum in Trento, where he will join Blanco, a white lion from the zoo who died five years ago, Pennacchioni said.</p>.<p>White rhinos normally live up to 40 years when held in captivity, and up to 30 years in the wild, she said.</p>.<p>Toby's death, which follows the passing of his female partner Sugar in 2012, leaves the Parco Natura Viva with one remaining white rhino: Benno, aged 39.</p>.<p>Toby was a southern white rhino -- only one of five rhino species that are not considered endangered, with an estimated population of around 18,000, according to the WWF.</p>.<p>However, there are only two examples left of the northern white rhino subspecies who live in Kenya, which are watched round-the-clock by armed guards, the environmental group says.</p>.<p><strong>Watch the latest DH Videos here:</strong></p>