Such birds have broad wings and broad, rounded tails. The flight feathers are divided into two groups. The innermost flight feathers are called the secondaries. The number of secondary flight feathers varies with the species of bird. Very small birds, such as hummingbirds, have very short wings with only six or seven secondaries to cover the space between the base of the wing and the primaries.
Most songbirds have nine or ten secondaries.
However a few birds, with large wings, can have far more secondaries. The Andean condor, which has wings of up to 1.5 metre has 25 secondaries. The wandering albatross has 32 secondaries. Such large wings helps these birds remain aloft for long periods of time. The outermost flight feathers are called the primaries.