World Bird List

Species factsheet
Black-crested Bulbul (Pycnonotus flaviventris)

Order: Pycnonotus flaviventris
Family: Bulbuls (Pycnonotidae)

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
flaviventris Nepal, n and e India to s China and c Myanmar
vantynei e and s Myanmar to s China and n Indochina
xanthops se Myanmar and w Thailand
auratus ne Thailand and w Laos
johnsoni c and se Thailand, s Indochina
elbeli islands off se Thailand
negatus s Myanmar and sw Thailand
caecilii n Malay Pen.