Pachyglossa is one of the three genera of flowerpeckers that make up the family Dicaeidae. 
These bird species are found in montane areas of South and Southeast Asia.
The genus Pachyglossa was resurrected to solve the paraphyly because the genus Pachyglossa was paraphyletic with respect to the genus Prionochilus.

1/ Thick-billed flowerpecker (Pachyglossa agilis) 
Chim sâu mỏ lớn

2/ Yellow-vented flowerpecker (Pachyglossa chrysorrhea)
Chim sâu bụng vạch

3/ Yellow-bellied flowerpecker (Pachyglossa melanozantha)
Chim sâu bụng vàng

The genus name Pachyglossa combines the Ancient Greek παχυς/pakhus meaning "thick" with γλωσσα/glōssa meaning "tongue", "mouth" (or "bill").