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Millions of mummified birds serving for religious purpose have been discovered from archeological sites along the Nile Valley of Egypt, in majority ibises. Whether these birds were industrially raised or massively hunted is a matter of heavy debate as it would have a significant impact on the economy related to their supply and cult, and if hunted it would have represented an ecological burden on the birds populations. Here we have measured and analysed the stable oxygen, carbon and radiogenic strontium isotope compositions as well as calcium and barium content of bones along with the stable carbon, nitrogen and sulfur isotope composition of feathers from 20 mummified ibises and birds of prey recovered from various archeological sites of Ancient Egypt. If these migratory birds were locally bred, their stable oxygen, radiogenic strontium and stable sulfur isotopic compositions would be similar to that of coexisting Egyptians, and their stable carbon, nitrogen and oxygen isotope variance would be close, or lower than that of Egyptians. On one hand, isotopic values show that ibises ingested food from the Nile valley but with a higher isotopic scattering than observed for the diet of ancient Egyptians. On the other hand, birds of prey have exotic isotopic values compatible with their migratory behaviour. We therefore propose that most mummified ibises and all the birds of prey analysed here were wild animals hunted for religious practice.

As part of a multidisciplinary project concerning the practices of mummification in ancient Egypt, we studied a series of 33 human remains, collected during the late 19th century. These heads of human mummies belong to the Osteology collection from the Musée des Confluences of Lyon. One of the important issues of this research project was to establish a chronology of the mummification processes. However, the lack of archaeological data and excavation reports does not allow the dating of the specimens. Thus, during this project, these heads have been radiocarbon dated in order to place the individuals in a reliable chronological and cultural framework. As a result, 20 samples of hair and 13 samples of linen textiles of the wrappings have been taken. The results raised a lot of uncertainties about the chronology of these mummies and the need to validate or correct the original date attributions were given by the discoverers. As an example, among the 13 mummies thought to be dated between the 11th and 20th Dynasties, none appears from this period. In the same way, six mummies were originally dated from the Ptolemaic period. However, only one belongs to this period, four are Roman, and the last one is from the New Kingdom. [ABSTRACT FROM AUTHOR]

An ancient Egyptian crocodile mummy (MHNL 90001591, Musée des Confluences, Lyon, France) dating to the Roman period and discovered at Kom Ombo (Upper Egypt) was analysed through synchrotron multiscale microtomography. Using this advanced technology, the virtual autopsy of the animal was carried out without affecting the bones, flesh, balms and linen bandages. The technique allows for the precise analysis of the specimen's bones and tissue, enabling us to establish the cause of death and the last meal(s) of the animal. From these data, we can conclude that this crocodile was hunted while living in the wild. This is the first evidence for this mode of obtaining animals to produce mummies. With this case study, it is apparent that the praxis related to the mummification of animals in ancient Egypt are more diverse than the current Egyptological reconstruction of that phenomenon. • Hunting as a source of animals to produce mummies. • Highlight to the cause of death and the last meal(s) of a crocodile. • Virtual autopsy of a crocodile mummy through 3D Synchrotron Imaging. • Diversity of the praxis related to the mummification of animals in ancient Egypt. [ABSTRACT FROM AUTHOR]