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Pachycephala is a genus of birds native to Oceania and Southeast Asia. They are commonly known as typical whistlers. Older guidebooks may refer to them as thickheads.

1/ Mangrove Whistler (Bách thanh lưng lâu, Pachycephala grisola also Pachycephala cinerea)

Alternate names for the mangrove whistler include the grey thickhead and white-bellied whistler.

The name Pachycephalidae is derived from Ancient Greek: "pakhus" (παχυς) meaning "thick" and "kephalē" (κεφαλή) meaning "head". The family name thus refers to the "thick-headed" birds, a characteristic of the whistlers and other members of the family.