The calf was badly wounded by a machete.
The program aims to protect elephants and black rhinos in East Africa.
Police said they found a bear head, two bear paws, meat and a gutted dead civet in Somjit Boonkong's backpack.
Poachers sell the horns for various purposes.
Wildlife trafficking continues to affect the elephants, giraffes, buffalo and antelope in Garamba.
Johannesburg breeder John Hume says that making rhino horn more easily available will deter poachers from killing the rare animals.
Donkey skins are boiled down to form the basis of a tonic believed to increase sex drive and fight aging in traditional Chinese medicine.
The lions were found with their heads, skin, tails and feet removed after an attack by poachers.
An international ban on trading rhino horn remains in place.
But experts worry legal schemes can't overcome poaching and illegal profits.
The death of a 13-year-old lion at the hands of an American hunter has sparked an international outcry.
The lion, known for his gentle demeanor, was reportedly shot with a bow and arrow in Zimbabwe.
As many as 50,000 elephants are killed each year for their tusks.