Feet for Flight by Michael L. May
Birds fly with their wings, right? But did you know that many birds also use their feet to fly? Some birds need them for takeoffs and landings. Other birds use their feet to control flight speed.
In order for the American coot to get off the ground, it must make a running start across the water. Other birds, such as the mallard duck, can jump right out of the water and into flight. But coots are too heavy and need to build up speed. Like an airplane rolling down the runway, a coot runs across the surface of the water until it reaches flight speed, then lifts off and flaps away.
Being airborne doesn't mean that the footwork is over. Some birds use their feet to slow down in flight. Now, it might seem that a bird could just stop flapping its wings and reduce speed. But it's not that simple. If you stop pedaling your bicycle when you're going downhill, you'll eventually slow down when you reach the bottom. But you still need brakes. Without brakes, flying birds and speeding bicycles can't stop fast enough.
One bird that uses its feet as air brakes is the greylag goose. When this bird comes in for a landing, it dangles its feet like small parachutes. The rushing air pushes against the broad, webbed feet and slows the goose down, allowing it to make a smooth landing in the water.
For some birds, even air brakes are not enough. Mute swans extend their webbed feet forward when landing. When their feet hit the water, the swans ski across the surface until they gradually slow and plop safely into the pond or lake.
So bird flight is more than just feathers and wings. It's feet, too. Whether taking off or landing, birds depend on their feet for flight.