Several Asian countries have the peacock as their national bird, notably India. In the case of Burma it's a different species, the grey peacock-pheasant.
White Peacock is one of those magic names, which is also associated with butterflies,
Peacocks get most of their colour from light reflection rather than a dye. The feathers have barbs, which in turn have rods. It is these rods that controls how light reflects and produces the green, golden yellow, brown and bright blue. White peacocks have a slightly different arrangement of the rods thus don't develop the usual colours.