Every year tens of thousands of baby deer are inadvertently killed by harvesting equipment while they're hiding in tall grass. A project in Germany is now saving many animals from an early death. We usually associate aerial drones with surveillance and destruction. It's less well known that they can also save lives. Just such a deployment is being tried at present in the Fichtel Mountains. A team of electronic engineers is using a drone to search meadows and fields where deer are suspected. The device has two eyes in the form of one infrared and one color camera. The infrared camera locates the animals by detecting their body heat. The color camera then ascertains whether they actually are deer. So far, it's been a striking success.