Their favorite nuts are Pandanus and Kamani. These nuts are of great importance to the basic diet of the Palm Cockatoo. These nuts grow on unusual looking tropical trees and are wild here in Hawaii. We gather these nuts every month and keep a well stocked supply for our birds as they consume several of these nuts a day. Male Palm Baby P. aterrimus Male Palm Cockatoos have noticeably larger upper mandibles than that of females.
Eye color is the same in both sexes.
In bright sunlight the iris is brownish in color with a black pupil. Overall body size in the male is recognizably larger than that of the female. Both sexes make wonderful pets and are very docile and loving, but due to the scarsity of these birds, should not be kept singly. Countries of origin will no longer issue export documents, and export papers from Singapore or Bangkok will not be recognized. Hence, the Palm Cockatoo should be kept solely for the purpose of breeding in our country.