public RedHeadDuck()
{
flyBehavior = new FlyWithWings();
quackBehavior = new QuackSilently();
}
public MallardDuck()
{
quackBehavior = new QuackSilently();
flyBehavior = new FlyWithWings();
}
public ModelDuck()
{
flyBehavior = new FlyNoWay();
quackBehavior = new QuackSilently();
}