Dimorphic Ostrich Author: Ghirin   The ostrich is the largest living bird. Adult males can stand up to nine feet tall and weigh up to 345 pounds, while females are somewhat smaller. Males have black plumage with white wing and tail plumes; females are dull grayish brown in color. Ostriches have small heads poised on long, mobile necks. Their bills are broad and flat. Their two-inch panoramic eyes provide these birds with excellent eyesight. Their eyes are actually larger than their brains. Os