There aren't many omens in the Odyssey compared to other ancient literature I've studied (or rather, there isn't the variety of omens that we might see in others, particularly tragedy). Bird omens are most significant. I believe the first omen we encounter is in book 2, between likes 145 and 178. read more
More specific and detailed information on these can be found in Anthony J. Podlecki’s article ‘Omens in the ‘Odyssey’’, in Greece & Rome, Vol. 14, No. 1 (Apr., 1967), pp. 12-23, Cambridge University Press. read more
The omens and prophecies that the Odyssey's characters constantly seem to encounter remind us that we're not operating in a world in which there's much room for free will. read more
Scylla, the Cyclops, and the Laestrygonians all eat some of Odysseus's men; Circe and the Lotus Eaters slip the men harmful drugs; and the feast of the Cattle of the Sun results in the destruction of his remaining crew. read more