Just FYI that right now we now have a SigFox gateway running to create an IoT network at the Los Amigos field station in lowland Peruvian Amazon. Amazing forest, tons of animals. We are using the network for animal tracking and getting coverage out to 6-8km on the ground, certainly further in the canopy. We'll have a better range map eventually.
If anyone else is interested in testing their IoT enabled devices in a real-world situation you are welcome to come down and try it out at Los Amigos. I'd love to see some edge-computing cameras or microphones!