This shot was taken the other day while at the Botanic Gardens with @julzmaioro. If you look closely, you can see yellow pollen around the base of his beak. This shot also supports my theory that the white 'tuft' of feathers is really only a couple of feathers.
Wonderful capture of this iconic bird - You have achieved outstanding focus and composition. A fav, and I would be interested to know whether there are more of these showy white feathers in the breeding season.
Ian