Whether they have any extant function or not, they have lost their former function and in that sense they do fit the definition of vestigiality. Vestigial structures are often called vestigial organs, although many of them are not actually organs.
There are quite a few birds famous for doing ritualized mating dances, so I would only list 5: The Red Capped Manakin, The Black-footed albatross, The Western and Clark's grebe, The Superb bird of Paradise, & The Victoria's riflebird.
In certain myths, the hummingbird bestows precious resources, making it a symbol of nature's bounty. In a tale told by the Ohlone tribe of the California region, the ruby-throated hummingbird got its vivid markings by returning fire to the world.he small but fierce creature appears in myths, dance and art going back for millennia. Perhaps because it possesses so many disparate qualities, such as beauty, delicacy and strength, the hummingbird symbolizes an unusually broad range of concepts in different cultures.