The Collaborative International Dictionary
Ornithomancy \Or*nith"o*man`cy\, n. [Gr. ?; 'o`rnis, 'o`rniqos, a bird + ? divination: cf. F. ornithomancie.] Divination by means of birds, their flight, etc.
Ornithomancy grew into an elaborate science.
--De
Quincey.
Wiktionary
n. divination by means of birds, their flight, etc.
Wikipedia
Ornithomancy (modern term from Greek ornis "bird" and manteia "divination"; in Ancient Greek: οἰωνίζομαι "take omens from the flight and cries of birds") is the practice of reading omens from the actions of birds followed in many ancient cultures including the Greeks, and is equivalent to the augury employed by the ancient Romans.
Ornithomancy in some form has been found globally among a wide variety of pre-industrial peoples.
Usage examples of "ornithomancy".
She lurked by the fire in the heavily perfumed tower room, interrupting Professor Trelawney's increasingly hysterical talks with difficult questions about ornithomancy and heptomology, insisting that she predicted students' answers before they gave them and demanding that she demonstrate her skill at the crystal ball, the tea leaves and the rune stones in turn.
She lurked by the fire in the heavily perfumed tower room, interrupting Professor Trelawney's increasingly hysterical talks with difficult questions about ornithomancy and heptomology, insisting that she predicted students' answers before they gave them and demanding that she demonstrate her skill at the crystal ball, the tea leaves and the rune stones in turn.