苦楝
The skull roof of the subfossil cranium was flattened, indicating the Cuban macaw fed on hard seeds, especially from palms. This is consistent with the habits of their large relatives on mainland South America and distinct from those of smaller, mainly frugivorous relatives. In 1876, Gundlach wrote that the Cuban macaw ate fruits, seeds of the royal palm ("Roystonea regia") and the chinaberry tree ("Melia azedarach"), as well as other seeds and shoots. Cuba has many species of palms, and those found in swamps were probably most important to the Cuban macaw. The pulp surrounding the seeds of the chinaberry tree were probably the part consumed by the Cuban macaw.