Sylvia mystacea has a predominantly Middle Eastern breeding distribution, which extends into south-eastern Europe in southern Russia, the Caucasus and parts of Turkey. Its European breeding population is relatively small (<150,000 pairs), but was probably stable between 1970-1990. Although there were declines in Turkey during 1990-2000 (trends were not available for Armenia and Georgia), the sizeable population in Russia increased, and the species probably remained stable overall. Consequently, it is provisionally evaluated as Secure.

Breeds in lower middle latitudes in arid continental climates, in scrub along river banks and on wooded lower slopes of mountains, also in orchards, nurseries, and along shelterbelt forest strips combined with irrigation.

Nest, deep cup, often thin-walled, of twigs, plant stems, grass leaves, and stems, with some rootlets, plant fibres, down, and spiders' webs, lined with finer grasses and rootlets, plus small feathers and hair. 4-5 eggs, sub-elliptical, smooth and glossy, white or faintly tinged green, profusely speckled, spotted, and blotched all over with brown, olive-brown, and grey. Incubation 11-13 days, both sexes but more by female.

Adult and larval insects, with some fruit in autumn. Feeds mainly under cover, hopping about inside canopy of low trees and bushes.

This species has a large range, with an estimated global Extent of Occurrence of 1,000,000-10,000,000 km². It has a large global population, including an estimated 86,000-300,000 individuals in Europe (BirdLife International in prep.). Global population trends have not been quantified, but the species is not believed to approach the thresholds for the population decline criterion of the IUCN Red List (i.e. declining more than 30% in ten years or three generations). For these reasons, the species is evaluated as Least Concern.

All populations migratory, moving south or south-west to winter in north-east Africa, Arabia and southern Iran. Entry into Africa apparently via Arabia.