Palatine bone luxation was diagnosed in a blue-and-gold macaw (Ara ararauna) on the basis of history, physical examination, and radiographic findings. The bird had a history of recent head trauma and subsequent inability to prehend food. Physical examination findings were normal except for a hyperextended maxillary beak. Simple reduction of the luxation was unsuccessful. Detailed analysis of radiographs, anatomic descriptions, and cadaver dissections revealed that the hyperextended maxillary beak was caused by the dorsal luxation of the palatine bones. The luxation was surgically reduced by introducing an intramedullary pin transversely across the infraorbital sinus dorsal to the palatine bones. The maxillary beak was then hyperextended while the luxated palatine bones were concurrently reduced ventrally to their anatomic position. The luxation was stabilized by passing absorbable suture around the suborbital arch and jugal bones bilaterally. Reduction and stabilization was successful; however, the macaw died of anesthetic complications after surgery.