During the field survey of a feasibility study on World heritage nomination for Eastern Mongolian Steppes, a joint team of Mongolian Bird Conservation Center and Eastern Mongolian Protected Area Administration have discovered two sites of a breeding colony of Jankowski’s Bunting Emberiza jankowskii from southeastern Mongolia, 7 June 2020. The species believed to be vagrant in the country before. Both sites were mountain hills and dominated by Stipa grasses and shrubs. The first site locates within the Protected Area, where there is no human influence and no livestock grazing, and a second site found near the village where there both threats exist and no protection. A team collected data on habitat requirements and checked all valleys, especially for the first site. All the valleys were occupied by the breeding buntings and this site provides the best habitat for nesting buntings. We believe that there can be more potential breeding mountains in the east, especially east of the SPA, a team member said. More surveys needed to estimate the population distribution and determine the threats because there can be threats from livestock grazing in the areas where there is no protection. Therefore, a team is looking for collaborators to survey for this globally endangered bunting in the further. In addition, MBCC team is working on a publication of the bunting based on their findings at the moment.