The Bar-throated Minla or Chestnut-tailed Minla (Minla strigula), is a species of bird in the family Leiothrichidae. It has traditionally been placed in the genus Minla.
They have a large range spanning most of South-east Asia. I took the photos above at the Visitor’s Centre at the Summit of Doi Inthanon (blue dot) where they are very easily seen.
Here’s a nice close-up that shows how the bird moves about in a twitchy way.