The black bulbul (Hypsipetes leucocephalus)

Ten subspecies are currently recognized, although the reproductive isolation mechanisms such as vocalization and geographic distributions of these populations still remain to be studied:

 

H. l. psaroides - Vigors, 1831: Originally described as a separate species. Found along the Himalayas from the Kunar Valley (north-eastern Afghanistan) and northern Pakistan through Arunachal Pradesh (northern India) and the central Himalayas to north-western Myanmar

Assam black bulbul (H. l. nigrescens) - Baker, ECS, 1917: Found in Assam and Manipur (north-eastern India), and the Chin Hills (western Myanmar)

Burmese black bulbul (H. l. concolor) - Blyth, 1849: Originally described as a separate species. Found from eastern Myanmar and southern Yunnan (southern China) through Indochina

H. l. ambiens - (Mayr, 1942): Found in north-eastern Myanmar and western Yunnan (southern China)

H. l. sinensis - (La Touche, 1922): Found in northern Yunnan (southern China)

H. l. stresemanni - (Mayr, 1942): Members of this race have white heads. Found in central Yunnan (southern China)

H. l. leucothorax - (Mayr, 1942): Members of this race have white heads. Found in central China

H. l. leucocephalus - (Gmelin, JF, 1789): Members of this race have white heads. Found in south-eastern China

H. l. nigerrimus - (Gould, 1863): Originally described as a separate species. Found in Taiwan

H. l. perniger - Swinhoe, 1870: Originally described as a separate species. Found on Hainan (off south-eastern China)

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