Now that Hurricane Danielle is bringing us the cold and soggy miseries, it’s almost enough to make you nostalgic for the seemingly interminable heat wave that lasted up until just last week. With the temperatures cooling, the big butterflies of midsummer — the swallowtails — will be on their last wings, replaced by a new cast led by that intrepid traveler, the monarch. Joined by less ambitious doppelgangers like the viceroy and the larger fritillaries, these heralds of late summer are appropr...
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