Despite the once successful Save the Rhino project, rhinos are under siege.
Similar footprint-recognition software has been used to create biometric signatures for white rhinos, polar bears, and cheetahs as well.
Among his other works on view are a rocking-chair bird, a series of life-sized rhinos and a gorilla whose chest opens to reveal a safe.
In the first eight months of this year, poachers had killed 749 rhinos in South Africa, up from 716 over the same period in 2014, according to the latest figures from the South African government.
Rhinohorns can be cut off without even killing rhinos.
Freeware's dirty little secret is that benefactors are about as rare as Javan rhinos.
The foundation, which is based at the White Oak Conservation Center, says only about 17,500 rhinos remain in the wild with another 1,200 living in captivity.
Stretching a full 3 metres in height, the paintings depict a troupe of majestic horses in deep colours, above a pair of boisterous rhinos in the midst of a fight.
There are many reports of people taming and even training Indian rhinos.
Assisted reproduction in rhinos is a relatively new technique - it first took place in Hungary in 2006 - but is now being used more and more.
Unlike African rhinos, Indian rhinos don't gore an enemy with the spike on their heads. They bite with large, sharp lower incisors.
And over the last decade, I traveled to over 40 countries to see jaguars and bears and elephants and tigers and rhinos.
Solitary species - such as tigers, domestic cats and rhinos - have less grey matter, the scientists found.
Patrols along the park's 280-mile South Africa and Mozambique border, where all 33 poached rhinos were killed, are also set to resume after being suspended three years ago.
But poaching and habitat loss mean there are few rhinos left in Asia, which is what could have prompted the dealers to look for supplies in Africa.
Jimmy: Mom, why do rhinos have horns?
A South African law enacted in 2008 required a permit for anyone hunting rhinos or even possessing a rhino part.
It will be difficult to expand other refuges because rhinos and rice flourish in the same kinds of places.
