N
any of various butterflies of the genus Papilio and related genera, esp P. machaon of Europe, having a tail-like extension of each hind wing: family Papilionidae 燕尾状物
Your photos fail to show, for example, that metres away from these half-finished benches are also newly-planted formal gardens, box hedges, roses, and sunflowers that, once mature, will teem with tortoisshell and swallowtail butterflies.
At the end of our four-hour hike, Remo pounced into a dense roadside thicket to catch a scarce swallowtail, a butterfly noted for its brilliant blue and gold tail whose design mimics the head of a distasteful insect to ward off predators.