We are having a few days of spring before the next snowstorm which is supposed to arrive mid-week. I'm not thinking about snow right now. I love the sun and warmth.
I watch the main wildflowers in our world closely. These wild crocuses ("Pasqueflowers") close their petals tightly whenever the air is cool. I'm guessing that their ability to rapidly pinch their petals closed is part of why they can survive the sub-freezing temperatures and snowstorms that are inevitable during our spring.