Photos: John Epperson/Denver Post/AP Photos (Rock Snot); Alamy (Remaining)

According to a report just released by the USDA, New York State is under attack from nonnative wild boars (“feral swine” began spreading from the South twenty years ago; the boars here may have gone awol from private game preserves in Pennsylvania). The snouty interlopers join an ever-growing menagerie of species that have already arrived to mess with our waterways, airspace, and general well-being.

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• Archive: “Topic”
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