Pycnonotus

Trivial name Latin name
Light-vented Bulbul Pycnonotus sinensis
Common Bulbul Pycnonotus barbatus
Black-headed Bulbul Pycnonotus atriceps
Red-whiskered bulbul Pycnonotus jocosus
Himalayan bulbul Pycnonotus leucogenys
Yellow-vented Bulbul Pycnonotus goiavier
Black-capped Bulbul Pycnonotus melanicterus
Scaly-breasted Bulbul Pycnonotus squamatus
Black-fronted Bulbul Pycnonotus nigricans
White-spectacled Bulbul Pycnonotus xanthopygos

comparison of wing and tail configuration1

1 According to Hartmann (2000a, 2000b and 2016)