It’s an unmistakable sound. One that elicits memories, sights and scents of events long ago. It recalls the joy of youth, the possibility of a spring evening. But it can also incite insomnia and the blind rage that accompanies it. Pseudacris crucifer is better known as the spring peeper, and for most people it is a more welcome harbinger. These remarkable frogs spend the winter under leaf litter in a state if suspended animation. Once overnight temperatures are regularly in the forties, they start thawing out and begin singing. So that ringing chorus is a signal that we’re finally shedding winter’s icy grip. We dare to hope that we’ve seen our last nor’easter of the season; and that warmer and greener days are close at hand. That hope manifests around the state on Facebook and Twitter (#peepers) – though not Instagram because photos of this tiny frog are elusive. It’s fun to watch the state gradually thaw from south to north, vicariously through social media. Posts always pop up first