Harlequin Duck

Histrionicus histrionicus

It's named for Harlequin, the colorfully patched clown of old Italian comedy, and its scientific name says it twice: histrionicus means 'theatrical.' That's the same root as 'histrionic.'

Histrionicus comes from the Latin histrio, 'actor.' Harlequin himself goes back to Helquin, a demon of old French legend.