Research conducted by Hustai National Park Trust biologists varies in both geography and scope. While Hustai National Park (HNP) has only a relatively small team of biologists, people from throughout the world travel to the park to assist HNP’s field research team. The work of the “eco-volunteers,” who serve as citizen scientists, contributes to the increased knowledge about the distribution, habitat use and social behavior of Przewalski’s horses. This information provides HNP staff with important data about the increasing Przewalski’s horse population and carrying capacity of the area. In addition, the financial contributions of the eco-volunteers, who pay their own expenses, help HNP with the cost of running the research and conservation program. Since 2004, 425 eco-volunteers from 25 different countries have volunteered in HNP.