Divination by means of birds, their flight, etc.(noun)
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Use "ornithomancy" in a sentence
"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."
"This chapter in the great volume of superstition was indeed cultivated with unusual solicitude amongst the Pagans -- _ornithomancy_ grew into an elaborate science."
"Tourism bosses in Worcestershire have compiled a modern guide to romantic ornithomancy."