Chestnut bulbul

The chestnut bulbul or chestnut-backed bulbul ("Hemixos castanonotus") is a songbird in the bulbul family, Pycnonotidae. The species was first described by Robert Swinhoe in 1870. It is found in southern China and northern Vietnam. Its natural habitat is subtropical or tropical moist lowland forests.
Taxonomy and systematics.
Formerly, some authorities classified the chestnut bulbul in the genus "Hypsipetes" and also as a subspecies of the ashy bulbul.
Subspecies.
Two subspecies are currently recognized: