How does Halitherses interpret this sign? ... He reads this sign to say that Odysseus is near.

Who is Halitherses and how does he interpret this?

In Greek mythology, Halitherses /ˌhælɪˈθɜːrˌsiːz/ (Ἁλιθέρσης), son of Mastor, was an Ithacan prophet who warned the suitors of Penelope after interpreting the symbols that Zeus sent to "be wise in time, and put a stop to this wickedness before he comes." The suitors do not heed Halitherses' warning.

What is Halitherses interpretation of the two fighting Eagles?

Dueling eagles suddenly swoop near the assembly, which the seer Halitherses interprets as a sign of Odysseus' return.