One autumn day early in the twenty-first century I drove out Route 2 from Boston to Concord. It is the same route Paul Revere followed in April 1775 to warn his fellow colonists of the approaching British army. Nowadays it is known for another, far deadlier, enemy.

Wild turkeys.

Returning to Boston in the late afternoon as dusk approached, I was rushing along the highway with my fellow motorists. Without warning, a flock of wild turkeys flew out of the bushes and took over the highway.