For the first time, a team of filmmakers capture an extraordinary behaviour never seen before: two tiger mothers sharing and caring for each other's cubs. A remarkable discovery that reveals just how much there is still to learn about these iconic big cats. Find out where to watch and discover a hidden world 🧡 bbcearth.com/shows/tiger-island #TigerIsland #TigerCubs #NewBehaviour Subscribe: bit.ly/BBCEarthSub Sign up to our newsletter for the latest news, updates and exclusives from BBC Earth bbcearth.com/newsletter Watch more: Best of BBC Earth 🌍 bit.ly/BestOfBBCEarth Best Animal Fights 🥊 bit.ly/BestAnimalFights Videos over 10 minutes ⏰ bit.ly/3SHJCEJ Planet Earth III 🌍 bit.ly/PlanetEarthIIIPlaylist Frozen Planet II ❄️ https:/bit.ly/FrozenPlanetIIPlaylist Blue Planet II in 4K 🌊 bit.ly/BluePlanetII4kPlaylist Welcome to BBC EARTH! The world is an amazing place full of stories, beauty and natural wonder. He...