The role of the Egyptian Vulture (Neophron percnopterus) as a bone accumulator in cliff rock shelters: an analysis of modern bone nest assemblages from North-eastern Iberia David Vilasís, Jordi Baucells, Jaume Anglada, Carlos Martorell, Jordi Nadal, Marta Moreno-García, L. Lloveras, R. Thomas • 2014