Sikkim Treecreeper

The Sikkim treecreeper is a member of the treecreeper family found in Bhutan, Nepal and north-east India. Its natural habitats are temperate forests and subtropical or tropical moist montane forests, and it inhabits broadleaf and mixed forests, where it usually forages at the middle and upper levels (Wikipedia, general species account).

The form C. d. manipurensis of southern Manipur and south-western Burma has a rich cinnamon throat and breast and is usually now treated as a separate species, Hume's treecreeper. The source read gives no size or breeding information, so none is stated.