The hawk was the principal sacred bird, and was identified with Horus and Ra, the sun-god. It was mainly worshipped at Edfu and Hierakonpolis. The souls of kings were supposed to fly up to heaven in the form of hawks, perhaps due to the kingship originating in the hawk district in Upper Egypt. Seker, the god of the dead, appears as a mummified hawk, and on his boat {25} are many small hawks, perhaps the souls of kings who have joined him. The mummy hawk is also Sopdu, the god of the east. The vulture was the emblem of maternity, as being supposed to care especially for her young. Hence she is identified with Mut, the mother goddess of Thebes. The queen-mothers have vulture head-dresses; the vulture is shown hovering over kings to protect them, and a row of spread-out vultures are figured on the roofs of the tomb passages to protect the soul. The ibis was identified with Tahuti, the god of Hermopolis. The goose is connected with Amon of Thebes. The swallow was also sacred. The crocodile was worshipped especially in the Fayum, where it frequented the marshy levels of the great lake, and Strabo's description of the feeding of the sacred crocodile there is familiar. It was also worshipped at Onuphis; and at Nubti or Ombos it was identified with Set, and held sacred. Beside the name of Sebek or Soukhos in Fayum, it was there identified with Osiris as the western god of the dead. The frog was an emblem of the goddess Heqt, but was not worshipped. The cobra serpent was sacred from the earliest times to the present day. It was never identified with any of the great deities, but three goddesses {26} appear in serpent form: Uazet, the Delta goddess of Buto; Mert-seger, 'the lover of silence,' the goddess of the Theban necropolis; and Rannut, the harvest goddess. The memory of great pythons of the prehistoric days appears in the serpent-necked monsters on the slate palettes at the beginning of the monarchy, and the immense serpent Apap of the underworld in the later mythology. The serpent has however been a popular object of worship apart from specific gods. We have already noted it on prehistoric amulets, and coiled round the hearths of the early dynasties. Serpents were mummified; and when we reach the full evidences of popular worship, in the terra-cotta figures and jewellery of later times, the serpent is very prominent. There were usually two represented together, one often with the head of Serapis, the other of Isis, so therefore male and female. Down to modern times a serpent is worshipped at Sheykh Heridy, and miraculous cures attributed to it (S.R.E.B. 213).