帝王蝶的迁徙之旅

trip. Along the way, they’d dodged birds and windmills and cars, eventually reaching the same patch of forest—perhaps even the same trees—that their great-grandparents had roosted in. For much of the winter, they had not eaten and had barely moved, jamming themselves so tightly against their fellow travelers that from a distance they looked like scales armoring the sides of the trees. Now they’d awakened, stretching their wings and warming up. Though I couldn’t spot them in the sky, I could see from my phone that Cinderella, Eric, and Carle were near. Over the next several weeks, I would keep tabs on them, following their movements with a level of detail that would have been impossible only a year ago. …