Pachycephala is a genus of birds native to the Austro-Pacific region. They are commonly known as typical whistlers. Older guidebooks may refer to them as thickheads, a literal translation of the generic name, which is derived from the Ancient Greek terms pachy 'thick', and kephale 'head'.

There are nearly 3 dozen species:

• Olive Whistler, Pachycephala olivacea
• Red-lored Whistler, Pachycephala rufogularis
• Gilbert's Whistler, Pachycephala inornata
• Mangrove Whistler, Pachycephala grisola
• Green-backed Whistler, Pachycephala albiventris
• White-vented Whistler, Pachycephala homeyeri
• Island Whistler, Pachycephala phaionotus
• Rusty Whistler, Pachycephala hyperythra
• Brown-backed Whistler, Pachycephala modesta
• Bornean Whistler, Pachycephala hypoxantha
• Sulphur-bellied Whistler, Pachycephala sulfuriventer
• Vogelkop Whistler, Pachycephala meyeri
• Yellow-bellied Whistler, Pachycephala philippinensis
• Gray-headed Whistler, Pachycephala griseiceps
• Fawn-breasted Whistler, Pachycephala orpheus
• Gray Whistler, Pachycephala simplex
• Golden Whistler, Pachycephala pectoralis
  • Lord Howe Golden Whistler, Pachycephala (pectoralis) contempta
  • Norfolk Island Golden Whistler, Pachycephala (pectoralis) xanthoprocta
  • Banda Sea Whistler, Pachycephala (pectoralis) macrorhyncha
  • Black-chinned Whistler, Pachycephala (pectoralis) mentalis
  • Fulvous-tinted Whistler, Pachycephala (pectoralis) fulvotincta
  • Bismarck Whistler, Pachycephala (pectoralis) citreogaster
  • Yellow-throated Whistler, Pachycephala (pectoralis) orioloides
  • Fiji Whistler, Pachycephala (pectoralis) vitiensis
• Sclater's Whistler, Pachycephala soror
• Lorentz's Whistler, Pachycephala lorentzi
• Black-tailed Whistler, Pachycephala melanura
• New Caledonian Whistler, Pachycephala caledonica
• Samoan Whistler, Pachycephala flavifrons
• Tongan Whistler, Pachycephala jacquinoti
• Regent Whistler, Pachycephala schlegelii
• Bare-throated Whistler, Pachycephala nudigula
• Hooded Whistler, Pachycephala implicata
• Golden-backed Whistler, Pachycephala aurea
• Drab Whistler, Pachycephala griseonota
• Wallacean Whistler, Pachycephala arctitorquis
• Black-headed Whistler, Pachycephala monacha
• White-bellied Whistler, Pachycephala leucogastra
• Rufous Whistler, Pachycephala rufiventris
• White-breasted Whistler, Pachycephala lanioides