By doing so they cool off as little as possible. And when they swim they hook their feathers together with special barbed hooks into a watertight cover. In this system the outgoing blood flow exchanges its heat with the incoming. The system is simple. The middle of the duck stays warm, only its feet are cold.
Termites are also intelligent climate managers.
They ventilate their hills differently each time. Sometimes with funnels, sometimes with vides. So we must start using systems which are better biodegradable and reusable. It is absurd that a telephone cell is Scotland is exactly the same as in Rome, while it must meet totally different demands. To get the one, you offer the other.