The Slaty-bellied Tesia, scientifically known as Tesia olivea, is a diminutive and elusive warbler belonging to the family Cettiidae.
This species is characterized by its slate-grey underparts, which give it its common name. Observers should look for its compact body and relatively short tail, which are typical of the tesias.
The Slaty-bellied Tesia thrives in the dense undergrowth of subtropical or tropical moist lowland forests, as well as in subtropical or tropical moist montane forests.
This bird has a wide range across several Asian countries. It can be found in the verdant landscapes of Bangladesh, Bhutan, China, India, Laos, Myanmar, Nepal, Thailand, and Vietnam.
The Slaty-bellied Tesia is currently classified as Least Concern on the IUCN Red List, indicating that, for now, it does not face an immediate threat of extinction in its natural habitat.