With the roads and brick housing blocks of Egypt's densely populated Nile Delta in the distance, Elsayed Abuhamed and his family have pitched their tents in a field scattered with straw, tied up their livestock, and are cooking over an open fire.
They are part of the El Dawaghra tribe, more than 300 families of livestock herders who for generations have wandered the land as nomads, resisting the urge to settle like many other Bedouin tribes.
