What do flamingos and central bank bosses have in common?

A flock of flamingos is called a "flamboyance" — an apt term for these flame-feathered creatures who one could imagine look like a swell of pink fire as they swoop down from one mass of shallow water to the next.

Central bankers also move in flocks as they gather in governing councils, boardrooms and courts to manage financial risk in a chaotic system dominated by a single currency, the dollar. But far from invoking spectacle and wonder, they aim to guard price stability and calm mark...