Wing coverts are gray, but the primaries, secondaries, and rectrices show a darker gray. The primaries are black to slate grey, with dark coverts and blackish on the secondaries. The breast, primaries, secondaries, and tail coverts are black. The secondaries and greater coverts have chestnut bars or spots. These transformers have stationary primaries, and rotating secondaries. The primaries, secondaries and tail are dark brown. In spring, birds hatched in the previous year may retain some barred secondaries and wing-coverts. Primaries are long of medium width with secondaries moderately long and broad. The primaries, secondaries, humerals and rectrices are brown-black. Small-diameter tactical weapons became primaries for small-diameter secondaries. Funds of funds include primaries, early secondaries and secondaries. These secondary valves are called "secondaries" by SHO enthusiasts. For more details about Primaries, Secondaries, Tertiary & Quaternaries refer to Operator precedence. The white primary flight feathers contrast with the black wing tips and dark secondaries. The inner secondaries or tertials and the central tail feathers appear wavy or corrugated.