We have gorgeous sulphur-crested (GALERITA) cockatoo babies. Accepting deposits now. The sulphur-crested cockatoo is one of the largest of the several species of beautiful white cockatoos. Although spectacular in appearance, this large parrot is very large, very intelligent. The sulphur-crested cockatoo subspecies vary in size, with the largest subspecies (C. g. galerita) reaching an adult size of about 20 inches from beak to the tip of the tail, and weighing nearly 2 pounds (31 ounces).