It's Groundhog Day. . . so let's do something silly. See my blog post on CSS: How To Show & Hide Using Layered Images.
Groundhog Art from favpng.com. I got the historical data from a table on this site.
WHAT DOES IT DO: Simple animation of historical groundhog data. Using the arrow keys, or scrollbar, choose a year from the slider below. If there is no data, the graoundhog wiill hide, otherwise, you may see them with or without a shadow.