Springtime?

Springtime proceeds by fits and starts in the upper Midwest. Last weekend there were frogs calling all day (and night) long in the little stream behind the house, and yesterday we had a brief but active snowfall.I know it will be spring soon because the daffodils and tulips are putting up little green shoots, and three months from now we'll be begging for just a taste of the cold weather we had yesterday. But right now I wonder...