It takes a huge effort to relocate a rhinoceros to a safe place where poachers can't get to it, but it must be done if the rare black rhino is to be saved.
Fionnuala Sweeney has the story about a group of conservationists who won't take extinct for an answer.
In this video from the World Wildlife Fund South Africa,
we follow the Black Rhino Range Expansion Project, darting and airlifting black rhinos one at a time.
In an upside-down helicopter ride to safety, 19 black rhinos made a more than 1,400 kilometer journey across South Africa.
A 10-minute ride to a clearing where they were crated and driven the rest of the way.
Within the last eight years, the project has translocated more than 100 South African black rhinos.
Translocation is a way to get new areas populated and also increase the breeding rate of rhinos.
The World Wildlife Fund says more than 340 rhinos have been poached already this year, surpassing the total number killed in all of 2010.
In fact, the western black rhino is now officially extinct, according to the International Union for Conservation of Nature.
All rhinos are threatened by habitat loss and killed for the commercial value of their horn.
Some are ground down and used in traditional Asian medicine.
In Indonesia, as few as 40 javan rhino[s] are believed to exist in the forests.
This is motion-activated footage captured by the World Wildlife Fund earlier this year. They say it's very difficult to see them face to face.
Our teams see them very, very rarely.
In fact, Ali, the team leader we have in Ujung Kulon, has only actually seen rhinos three times in the 20 years that he's been studying them.
But Barney Long, with World Wildlife in Indonesia, is hopeful for the Javan rhinos because of the relocation projects in Africa.
If you look at the white rhino, for example, in the early 1900s, it was actually thought to be extinct.
And with this formula of protection and translocation, over 100 years that population went from just over 20 to over 20,000 today.
And as they try to save the black rhino through relocation,
there are plans for a move deep in the jungles of Java within the next few years, efforts to reverse the tides for rhino species on the brink of extinction.