In the heart of South Africa's Kwa Zulu Natal, a critical mission is underway to relocate many highly endangered black rhinos to two new reserves. An operation this size relies on meticulous precision, execution and highly specialised tools- such as the use of the tranquilising drug M99. M99, ten thousand times more potent than morphine, has revolutionised wildlife translocation. It enables wildlife veterinarians to safely manage animals' stress and monitor their condition whilst working with speed out in the field.