Tesia

The tesias are a genus, Tesia, of Old World warbler. The genus was once included in the large family Sylviidae but recent research placed it within the new family Cettiidae. The genus has a discontinuous distribution in East and South East Asia. The three northern species range widely across southern China, Burma, Northern Thailand and Laos and into India, southern Nepal and Vietnam; whereas the other two species are found in Java and the Lesser Sundas in southern Indonesia. One species of tesia, the Chestnut-headed Tesia, which occupies the northern area of the genus' range, is sometimes split into the genus Oligura. The Russet-capped Tesia was once considered to be a race of the Timor Stubtail, Urosphena subulata. The three northern species are sometimes known as ground-warblers.