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You might not have given bird pee and poo too much thought before but there's more to the white splatters we see than you may have realised. Dr Alex Bond, Senior Curator of Birds at the Museum, explains the science behind how birds deal with food waste. ---------------- The Natural History Museum in London is home to over 80 million specimens, including meteorites, dinosaur bones and a giant squid. Our channel brings the Museum to you - from what goes on behind the scenes to surprising science and stories from our scientists. Subscribe to our channel for the latest films and live broadcasts about the natural world http://www.youtube.com/naturalhistorymuseum Website: http://www.nhm.ac.uk Twitter: http://twitter.com/NHM_London Facebook: http://fb.com/naturalhistorymuseum Instagram: http://instagram.com/natural_history_museum