Which two ingredients make up the main flavoring in a Yellow Bird cocktail?

The Yellow Bird cocktail is known for its vibrant and tropical flavor, primarily achieved through the combination of rum and Galliano. Rum contributes a smooth, sweet base that is characteristic of many tropical drinks, while Galliano, an herbal liqueur with vanilla and anise notes, adds complexity and a distinct sweetness that enhances the overall flavor profile. This combination creates the refreshing and balanced taste that defines the Yellow Bird, making it a popular choice among cocktail enthusiasts.

The other ingredients listed in the alternatives do not typically form the basis for this particular cocktail, as they either represent different flavor profiles or cocktail constructions altogether. Thus, rum and Galliano are the key components that establish the unique character of the Yellow Bird.