Sumatran rhinoceroses do not thrive outside of their ecosystem.
The London Zoo acquired a male and female in 1872 that had been captured in Chittagong in 1868.
The female named "Begum" survived until 1900, the record lifetime for a captive rhino.
Begum was one of at least seven specimens of the extinct subspecies D. s. lasiotis that were held in zoos and circuses.
In 1972, Subur, the only Sumatran rhino remaining in captivity, died at the Copenhagen Zoo.

Despite the species' persistent lack of reproductive success, in the early 1980s, some conservation organizations began a captive-breeding program for the Sumatran rhinoceros.
Between 1984 and 1996, this ex situ conservation program transported 40 Sumatran rhinos from their native habitats to zoos and reserves across the world.
While hopes were initially high, and much research was conducted on the captive specimens, by the late 1990s, not a single rhino had been born in the program, and most of its proponents agreed the program had been a failure.
In 1997, the IUCN's Asian rhino specialist group, which once endorsed the program, declared it had failed "even maintaining the species within acceptable limits of mortality", noting that, in addition to the lack of births, 20 of the captured rhinos had died.
In 2004, a surra outbreak at the Sumatran Rhinoceros Conservation Centre killed all the captive rhinos in Peninsular Malaysia, reducing the population of captive rhinos to eight.

Seven of these captive rhinos were sent to the United States (the other was kept in Southeast Asia), but by 1997, their numbers had dwindled to three: a female in the Los Angeles Zoo, a male in the Cincinnati Zoo, and a female in the Bronx Zoo.
In a final effort, the three rhinos were united in Cincinnati.
After years of failed attempts, the female from Los Angeles, Emi, became pregnant for the sixth time, with the zoo's male Ipuh.
All five of her previous pregnancies ended in failure.
Reproductive physiologist at the Cincinnati Zoo, Terri Roth, had learned from previous failures, though, and with the aid of special hormone treatments, Emi gave birth to a healthy male calf named Andalas (an Indonesian literary word for Sumatra) in September 2001.
Andalas's birth was the first successful captive birth of a Sumatran rhino in 112 years.
A female calf, named "Suci" (Indonesian for "pure"), followed on 30 July 2004.
On 29 April 2007, Emi gave birth a third time, to her second male calf, named Harapan (Indonesian for "hope") or Harry.
In 2007, Andalas, who had been living at the Los Angeles Zoo, was returned to Sumatra to take part in breeding programs with healthy females, leading to the siring and 23 June 2012 birth of male calf Andatu, the fourth captive-born calf of the era; Andalas had been mated with Ratu, a wild-born female living in the Rhino Sanctuary at Way Kambas National Park.

Despite the recent successes in Cincinnati, the captive-breeding program has remained controversial.
Proponents argue that the zoos have not only aided the conservation effort by studying the reproductive habits, raising public awareness and education about the rhinos, helping raise financial resources for conservation efforts in Sumatra but, moreover, to have established a small captive breeding group.
Opponents of the captive breeding program argue that the losses are too great; the program is too expensive; removing rhinos from their habitat, even temporarily, alters their ecological role; and captive populations cannot match the rate of recovery seen in well-protected native habitats.
In October 2015 Harapan, the last rhino in the Western Hemisphere, left the Cincinnati Zoo to Indonesia.

In August 2016, there were only three Sumatran rhinos left in Malaysia, all in captivity in the eastern state of Sabah: A male named Tam and two females named Puntung and Iman.
In June 2017, Puntung was put down due to skin cancer.
Tam died on 27 May 2019 and Iman died of cancer on 23 November 2019 at the Borneo Rhino Sanctuary.
The species became extinct in Malaysia, its native land in 2019.

In Indonesia, meanwhile, a seventh rhi
Sumatran rhinoceroses do not thrive outside of their ecosystem. The London Zoo acquired a male and female in 1872 that had been captured in Chittagong in 1868. The female named "Begum" survived until 1900, the record lifetime for a captive rhino. Begum was one of at least seven specimens of the extinct subspecies D. s. lasiotis that were held in zoos and circuses. In 1972, Subur, the only Sumatran rhino remaining in captivity, died at the Copenhagen Zoo.
Despite the species' persistent lack of reproductive success, in the early 1980s, some conservation organizations began a captive-breeding program for the Sumatran rhinoceros. Between 1984 and 1996, this ex situ conservation program transported 40 Sumatran rhinos from their native habitats to zoos and reserves across the world. While hopes were initially high, and much research was conducted on the captive specimens, by the late 1990s, not a single rhino had been born in the program, and most of its proponents agreed the program had been a failure. In 1997, the IUCN's Asian rhino specialist group, which once endorsed the program, declared it had failed "even maintaining the species within acceptable limits of mortality", noting that, in addition to the lack of births, 20 of the captured rhinos had died. In 2004, a surra outbreak at the Sumatran Rhinoceros Conservation Centre killed all the captive rhinos in Peninsular Malaysia, reducing the population of captive rhinos to eight.
Seven of these captive rhinos were sent to the United States (the other was kept in Southeast Asia), but by 1997, their numbers had dwindled to three: a female in the Los Angeles Zoo, a male in the Cincinnati Zoo, and a female in the Bronx Zoo. In a final effort, the three rhinos were united in Cincinnati. After years of failed attempts, the female from Los Angeles, Emi, became pregnant for the sixth time, with the zoo's male Ipuh. All five of her previous pregnancies ended in failure. Reproductive physiologist at the Cincinnati Zoo, Terri Roth, had learned from previous failures, though, and with the aid of special hormone treatments, Emi gave birth to a healthy male calf named Andalas (an Indonesian literary word for Sumatra) in September 2001. Andalas's birth was the first successful captive birth of a Sumatran rhino in 112 years. A female calf, named "Suci" (Indonesian for "pure"), followed on 30 July 2004. On 29 April 2007, Emi gave birth a third time, to her second male calf, named Harapan (Indonesian for "hope") or Harry. In 2007, Andalas, who had been living at the Los Angeles Zoo, was returned to Sumatra to take part in breeding programs with healthy females, leading to the siring and 23 June 2012 birth of male calf Andatu, the fourth captive-born calf of the era; Andalas had been mated with Ratu, a wild-born female living in the Rhino Sanctuary at Way Kambas National Park.
Despite the recent successes in Cincinnati, the captive-breeding program has remained controversial. Proponents argue that the zoos have not only aided the conservation effort by studying the reproductive habits, raising public awareness and education about the rhinos, helping raise financial resources for conservation efforts in Sumatra but, moreover, to have established a small captive breeding group. Opponents of the captive breeding program argue that the losses are too great; the program is too expensive; removing rhinos from their habitat, even temporarily, alters their ecological role; and captive populations cannot match the rate of recovery seen in well-protected native habitats. In October 2015 Harapan, the last rhino in the Western Hemisphere, left the Cincinnati Zoo to Indonesia.
In August 2016, there were only three Sumatran rhinos left in Malaysia, all in captivity in the eastern state of Sabah: A male named Tam and two females named Puntung and Iman. In June 2017, Puntung was put down due to skin cancer. Tam died on 27 May 2019 and Iman died of cancer on 23 November 2019 at the Borneo Rhino Sanctuary. The species became extinct in Malaysia, its native land in 2019.
In Indonesia, meanwhile, a seventh rhi
Sumatran rhinoceros