I see you liked this so I'm adding more to it. Ravens have been seen showing their plumicorns when both being affectionate and in displays of dominance. In this video, the male on the right is shown doing both. Both male and females are capable of displaying plumicorns however.
I just found out that, much like owls, common ravens have plumicorns on their head that they can display at will, though it seems they very rarely choose to. It's theorized they're used to communicate emotions or status to other ravens.
Behold the beautiful African Fish Eagle
Known for its striking white head, dark body, and powerful yellow beak, this iconic bird of prey is found near lakes and rivers across sub-Saharan Africa. It mainly hunts fish and is famous for its loud, distinctive call.