Key Biodiversity Mae Yom National Park is an important site for the conservation of the globally threatened Green Peafowl Pavo muticus. This species was formerly widespread along the Mae Yom river but disappeared due to hunting, logging and encroachment. Its rediscovery at the site, in March 1996, led to a wide-ranging survey for the species and other pheasants in northern Thailand, which located a population of over 200 individuals, shared between Mae Yom National Park and two other IBAs: Wiang Lor Wildlife Sanctuary and adjacent area to the east (TH014) and Doi Phu Nang (TH015). In addition, there is a record of the globally threatened Silver Oriole Oriolus mellianus from the site, and the globally near-threatened White-rumped Falcon Polihierax insignis also occurs.