They are spectacular birds but unlike your royals these birds don’t get any long plumes on their heads in breeding plumage. In fact, breeding adults have bald heads and, as you’d expect, the colour of the plumage is a function of both food sources and the individual’s age. Immature birds - there are several in the above photos - are paler and have fully feathered heads.
It's what I thought but I had to check with you. I get it a lot in my pictures where some areas look not quite part of the scene. Photos are funny that they show you different to what you 'thought you seen'.