Camera-trapping has been considered as an important method for monitoring large and medium-size mammals and terrestrial birds, and with high applied value to biological inventory for protected areas. From October to December 2014, we set up 40 infrared camera monitoring sites (1 camera for each two ha.) in the northern part of Ailaoshan National Nature Reserve, Yunnan Province, to monitor wild mammals and birds in mid-mountain humid evergreen broad-leaved forest. During the total 1961 camera days, we identified 10 mammals species and 10 bird species from 566 independent images. According to the relative abundance index (RAI), Asian red-cheeked squirrel (Dremomys rufigenis) and wild boar (Sus scrofa) were ranked as two most abundant mammals, while silver pheasant (Lophura nycthemera)、long-tailed thrush (Zoothera dixoni) and spotted forktail (Enicurus maculatus) were ranked as the three most abundant bird species. Among the twenty wild mammal and bird species, four species were categorized as class II state key protected wild animals, two species were listed by the IUCN global red list as Vulnerable, two and three species were classified as Appendix II and III by CITES, respectively. Although several key territorial mammal and bird species were not recorded, this preliminary research still provides basic information of biodiversity for establishing camera-trapping routine

survey and conservation management of the natural reserve.