A large, active, noisy black tit with white shoulders, white edgings to the wing feathers, and a barred gray-and-white undertail. Pairs and small groups form the core of mixed-species feeding flocks in broadleaf woodland and thorn scrub. The species is often detected by its noisy buzzing and chirping vocalizations, including a sweet-and-scratchy “diddy-dzee-dzee-dzee-dzee-dzee.” The very similar Carp’s Tit is black under the tail; ranges only narrowly overlap.