Colombia, Costa Rica, Honduras, Nicaragua, Panama.
Eastern Honduras, eastern and central Nicaragua, Costa Rica (except drier north-west), Panama (including Isla del Rey in Pearl Is, where perhaps introduced by Indians) and adjacent north-western Colombia.
 
Population
Estimated population is unknown (2010).
Grey-headed Chachalaca (Ortalis cinereiceps) [XC178189]
by Allen T. Chartier from Parque Nacional Patuca, Las Mar\u00edas Abajo forest patch, Olancho, Honduras (song)
Grey-headed Chachalaca (Ortalis cinereiceps) [XC137707]
by Guillermo Funes from Puntarenas, Costa Rica (call)