Sometimes, high-voltage power wires according to the article written by Beth Daley for The Boston Globe
In a 250-foot-wide power line corridor off Route 163 in Southeastern Connecticut. Transmission corridors have long been considered symbols of environmental degradation, with their enormous steel skeletons and high-voltage lines slicing through forests, wetlands, and salt marshes; they divide the landscapes that thousands of species need to survive. Yet now they are gaining a new reputation: As critical homes for faltering species of birds, bees, butterflies, plants, and a host of other species.
Read the full article at the SOURCE: The Boston Globe – Green Lines