But rather than leave the child to die, Rainilaiarivony's father reportedly followed the advice of an ombiasy (astrologer) and instead amputated a joint from two fingers on his infant son's left hand to dispel the ill omen.
In many post-conversion Western traditions, ravens have long been considered to be birds of ill omen and death, in part because of the negative symbolism of their all-black plumage and the eating of carrion.
Nevertheless, some saw an evil omen in the fact that he had returned to Athens on the very day when the ceremony of the Plynteria (the feast where the old statue of Athena would get cleansed) was being celebrated.
Recent research suggests that much of his prophetic work paraphrases collections of ancient end-of-the-world prophecies (mainly Bible-based), supplemented with references to historical events and anthologies of omen reports, and then projects those into the future in part with the aid of comparative horoscopy.
Revenue remained scarce for the regency, the Genoese once again seized the imperial possessions of Chios and Phocaea, and on 19 May 1346, a part of the Hagia Sophia cathedral collapsed, a terrible omen in the eyes of the capital's inhabitants.
The Enuma anu enlil, written during the Neo-Assyrian period in the 7th century BC, comprises a list of omens and their relationships with various celestial phenomena including the motions of the planets.