Turns out the forest has a group chat 📞   Treehoppers might be tiny, but they've got plenty to say! They communicate through vibrations sent along the plants they live on, most of which are too quiet for us to hear. But when danger appears, sending the right signal can make all the difference.    Celebrate 20 years of Planet Earth with us. Find out where to watch the full episode via our link in bio 💚 #PlanetEarth #DavidAttenborough #PE20 #PEIII