inhabitant / service design by drones

We try to use drones which disguised as birds to protect the wild elephants from human s'hunting.

The drones that lives with the elephant family is supplies by solar cells battery.
They install heat sensors to identify the closing human beings poachers, and send out a warning message through the infrasound.
Elephants communicate with family members through infrasound, but human beings can't hear the infrasound.
So it can remind the elephants to evacuate immediately and not to let the human hunter be aware of that.