...cactuses, to the birds that eat them, right up to the large predators like the jaguars,” said William Radke, the manager of the San Bernardino National Wildlife Refuge, east of Douglas, Arizona. Radke said the fence would prevent snakes and turtles, as well as wild turkeys and road runners from
crossing. In addition, the bright lights at the top of the tall fence would interfere with birds’ ability to navigate by the stars. “A lot of migratory birds actually migrate at night, using stellar navigation and the moon to navigate....