Аннотация:Khamnigan language is an endangered language spoken in Mongolia, China and Russia. In Mongolia, the Khamnigan language is on the verge of extinction. The Mongolic-Evenki diglossia recorded by B.Rinchen in 60-s and preserved to a certain extent among Khamnigans in China is now completely lost inMongolia. Evenki influence in the past manifests via a number of loanwords still in use. Khamnigan language in Mongolia preserves a number of archaic phonetic features.In this paper we presented a part of our lexical materials and folklore samples along with description of some customs collected during our expedition to Mongolia in 2019. A considerable share ofcollected data have not been attested in previous lexicographic and folklore works on Khamnigans of Mongolia.