Stepping onto an old wooden duck blind in the middle of the York River, Bryan Watts looks down at a circle of sticks and pine cones on the weathered, guano-spattered platform. It’s a failed osprey nest, taken over by diving terns.
“The birds never laid here this year,” said Watts, near the mouth of Virginia’s Chesapeake Bay. “And that's a pattern we've been seeing these last couple of years.”
