My wife and I (well, mainly her) have a bird feeder in the back yard, which we keep seeds in for much of the winter and spring. Generally, we have an assortment of bird varieties including an occasional cardinal pair. But when it snows, we have as many as six or seven pairs of cardinals, which I can understand when there is snow on the ground. But today, it's snowing, but there's no accumulation and yet the cardinals are thronging the feeder. I guess it's similar to humans who run to the store for milk and bread whenever snow is in the forecast; the cardinals decide to go get sunflower seeds.