What is a group of flamingos called?

A group of flamingos is properly called a flamboyance, a term that plays neatly on both the birds' vivid pink color and their showy, theatrical presence when gathered in large numbers at a lake or wetland. English collective nouns for animals often have this kind of playful, descriptive quality, and flamboyance is considered one of the more fitting examples.

A gaggle refers to geese, and a pod is typically used for whales or dolphins, so neither term applies to flamingos, even though both are common collective nouns for other animals that people sometimes mix up.

Flamingos are not naturally pink from birth, their color comes entirely from pigments called carotenoids in the algae and small crustaceans they eat, and flamingos raised on a diet lacking these pigments, such as in some poorly managed captive settings, can actually turn pale or white.