1.4M views · 12K reactions | The hunt is on for these killer whales to find their next meal, king penguins. Watch World's Deadliest Whale, Wednesday at 8pm as part of Ocean Predators Week on National Geographic Wild | National Geographic UK | Facebook

Conservation researchers at Whipsnade have found four distinct sounds made by Asian elephants 🐘 - a ‘trumpet’, a ‘rumble’, a ‘roar’ and a ‘chirp’. Turn your volume up to hear the different sounds! 🔊 It is the first time that small, acoustic loggers have been used with elephants in a zoo, and it's hoped that the recordings could lead to a better understanding of elephant behaviour in the wild. Find out what the different sounds might mean here: http://ow.ly/XNoJ50IHzu5 | Whipsnade Zoo