It's a territorial display, intended to show the space is occupied.
Spread Your Wings was created in 1977.
Spread My Wings was created on 1990-01-11.
For air braking; slowing themselves down to ground velocity so they don't skid.
Birds with their wings streched out have more surface area so they catch the air, but birds with their wing tucked into them have no traction and no air catches them.
Yes
Take away its wings.
Comorant
Birds use their wing muscles to spread out their wings when they are ready to fly. Birds use thermal air currents, updrafts, and wind to soar and flap their wings when needed.
Sky Dancers - 1996 Spread Your Wings 1-11 was released on: USA: 1996
Kindergarten - 2001 Spread Your Wings 1-3 was released on: USA: 28 August 2001
The TWA Building by Eero Saarinen at the JFK Airport in New York looks like a bird with spread wings just about to lift off the ground.
It needs an engine to move it forward so that the wings generate lift. While stationary the wings generate no lift, or at least not enough to lift the plane off of the ground.