The rare black-backed oriole showed up outside Reading, Pennsylvania, and birdwatchers flocked to the scene
By Jason Daley
DECEMBER 15, 2017
At almost any given time, there’s an unusual bird that has gotten lost. Perhaps it missed some migration cue or was blown off course by winds. For example, this week, a Eurasinan mistle thrush showed up in New Brunswick, the first time this bird has been seen on the continent. An irruption of snowy owls recently flocked to the northern U.S., creatures that normally live and breed in much colder climates. For each of these events, there are legions of bird enthusiasts ready and willing to drive for a few hours—or even a few days—to catch a glimpse of these avian vagrants.