a large bird, the male of which has long blue and green tail feathersthat it can lift up and spread out → peahen.——朗文当代大辞典

A male peafowl, characterized by brilliant plumage, and a very long tail whose coverts can be erected and fanned out to display their eye-like markings; esp. a male of the common species, Pavo cristatus, which has an iridescent greenish-blue head and breast.——牛津当代大辞典  @en