Red-crowned bird the largest East Asian crane. It is actually the rarest cranes in the world. In some parts of the world, it is known as a symbol of longevity, fidelity and luck. It is named after its natural patch of red bare skin on the crown. The patch seems to become brighter in the mating season. These birds are snow-white in color, with black patch on the wing and white tail feathers. Male birds are black on the throat, cheeks, and neck, while the females are pearly gray. It belongs to the category of largest cranes, measuring 4 ft 10 inches to 5 ft 2 inches tall.