The IBA comprises Doi Suthep-Pui National Park, a relatively isolated mountain massif, including several discrete peaks, which forms the western boundary of the Mae Ping valley. Mixed deciduous forest and deciduous dipterocarp forest occupy much of the lower slopes. With increasing elevation, there is a greater evergreen component, especially along stream valleys, and, above 900-1,000 m asl, a hill evergreen forest formation occurs, including members of the Fagaceae. Coniferous forest occurs in small stands on drier ridges. The vegetation has been greatly modified at mid-elevations, where large areas of hill evergreen forest have been cleared for shifting cultivation; consequently this altitudinal band now supports a mosaic of grassland, scrub and secondary growth. The largest areas of intact forest (covering c.5,180 ha) are found on the eastern slopes of Doi Suthep and Doi Pui peaks.
Two globally threatened species occur at the site, Mrs Hume's Pheasant Syrmaticus humiae, a rare resident, and Grey-sided Thrush Turdus feae, an uncommon winter visitor. In addition, there are historical records of two globally vulnerable species, Dark-rumped Swift Apus acuticauda, recorded in 1965, and Giant Nuthatch Sitta magna, recorded in 1980. It is unlikely that the nuthatch still occurs, given that its preferred habitat, coniferous forest between 1,200 and 1,800 m asl, has been cleared. The globally near-threatened White-rumped Falcon Polihierax insignis is an uncommon resident of the lower slopes; this species is considered nationally threatened in Thailand. Another globally near-threatened species, Japanese Paradise-flycatcher Terpsiphone atrocaudata, is a rare passage migrant at the site. The site qualifies under criterion A3 because it supports 14 species restricted to the Sino-Himalayan Temperate Forests (Biome 07), 46 species restricted to the Sino-Himalayan Subtropical Forests (Biome 08) and 10 species restricted to the Indo-Malayan Tropical Dry Zone (Biome 11). See Appendix 3 for details.
Non-bird biodiversity: Mammals Southern Serow Capricornis sumatra(EN)sis (VU) Asian Gold(EN) Cat Catopuma temminckii (VU) East Asian Porcupine Hystrix brachyura (VU) Assamese Macaque Macaca assam(EN)sis (VU) Northern Pig-tailed Macaque Macaca leonina (VU) Asian Black Bear Ursus thibetanus (VU) Reptiles Big-headed Turtle Platysternon megacephalum (EN) Amphibians Large Warted Treefrog Theloderma gordoni (VU) Plants Dipterocarpus turbinatus (CR) Shorea farinosa (CR) Anisoptera costata (EN) Dalbergia oliveri (EN) Dipterocarpus costatus (EN) Shorea roxburghii (EN) Aglaia chittagonga (VU) Hopea odorata (VU)
BirdLife International (2022) Important Bird Areas factsheet: Doi Suthep-Pui. Downloaded from http://www.birdlife.org on 23/05/2022.