Swallowtail is Paula's next stop - a home furnishings shop in Russian Hill where the accent is on the bizarre.

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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.

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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.

BBC: Switzerland��s valley of butterflies

The mesh bag was long enough that if we caught a tiger swallowtail or a spicebush swallowtail, or a mourning cloak, or a European cabbage, or a common sulphur, or a red admiral, or a painted lady, or a monarch, or a viceroy we could, with a twist of the wrist, flip its tapered tip over the wire rim and trap the butterfly inside.

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