In about 1920, a groundhog at the National Zoo in Washington, D.C. was photographed poking his head out of his manmade burrow:   Ground hog. Photo by National Photo Company, circa 1920. http://hdl.loc.gov/loc.pnp/npcc.01058 There is no specific month and day given for this photo, but I see some icicles at the top of the image and perhaps snow in the foreground. So, I like to think this photo was taken on Groundhog Day and our friend is considering whether to come out and see if he has a shadow. Another photo of this groundhog in the National Photo Company Collection is below:   Ground hog. Photo by National Photo Company, circa 1920. http://hdl.loc.gov/loc.pnp/npcc.01059 The original negative numbers for these two…