Dudhwa National Park, located in Uttar Pradesh, became the first park in India to see the relocation of several Greater One-Horned Rhinoceros (Rhinoceros unicornis Linnaeus 1758) in 1984. Nine rhinos were brought in from Assam and Nepal and released in an electrified fence over two years. While the forest department managed and monitored the population over the years, and the population saw a rise in number, there was increasingly a need for a more systematic and scientific method. Marking the thirty years of the first relocation, WWF-India has released a new monitoring field guide, compiling the individual rhinos by the way of photographs and morphological characteristics. It also includes sighting data sheets for each rhino and family histories of each of the rhinos.