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Vultures face extinction across the world. And scientists point out that they're a valuable part of our ecosystem. Jemima Parry-Jones, director of the UK-based International Centre of Birds of Prey, has been telling Â鶹Éç Newsday why the vulture populations are declining and what's being done to save them. (Caption: Vultures feed on a carcass in South Africa. Credit: Mujahid Safodien/AFP/Getty Images)