The Sikkim treecreeper (Certhia discolor) is a species of bird in the treecreeper family.It is found in Bhutan, China, India, Laos, Burma, Nepal, Thailand, and Vietnam.Its natural habitats are temperate forests and subtropical or tropical moist montane forests.The form C. d. manipurensis of southern Manipur and southwestern Burma has a rich cinnamon throat and breast, and molecular evidence and is usually now treated as a separate species, the Hume's Treecreeper, C. manipurensis Hume, 1850.