What do swans do when they need to take a rest and they are flying at 33000 feet?

When swans need to take a rest while flying at high altitudes, they can glide or soar, allowing them to conserve energy without flapping their wings continuously. They may also descend to a lower altitude where the air is less turbulent and conditions are more conducive for resting. Swans can briefly stop flapping their wings to catch their breath while maintaining a steady glide. However, they typically do not remain airborne for extended periods without resting, as continuous flight at such heights can be exhausting.