This wonderful video from the Cape Leopard Trust gives an excellent overview of what field researchers must do to learn about cats in the wild. While they are looking for a big leopard, the same procedures are followed by scientists studying the small wild cats.
The Cape Leopard Trust in South Africa uses research as a tool for conservation, finding solutions to human-wildlife conflict and inspiring interest in the environment through an interactive and dynamic environmental education program. As well as leopards, they are studying a smaller cat through the Cedarburg Caracal Project.