NEW HAVEN, Vt. – The black salamander with yellow spots sat on the roadside in the dark, ready to make a go of it. But it was not on its own. It got help from an escort — one of 45 people who volunteered on a recent night to carry salamanders, frogs and newts across the road during their annual migration to mate. ... From rural Vermont to urban centers like Philadelphia, human escorts, called bucket brigades in some places, help amphibians make it to their mating areas without getting squashed by cars. It's part education, part conservation, and part...