Not Winging It: Birders Hope Hard Data Will Help Save the Species They Love—and the Ecosystems Birds Depend On

The magnolia warbler travels as many as 2,000 miles, high above the Gulf of Mexico and across the entirety of the United States, before arriving in the cool climate of Canada’s boreal forest to breed. On a morning in May, one of the tiny yellow songbirds found itself entangled in a black net strung u...