Not too late to get a butterfly garden started! Get a couple butterfly bushes (I recommend "Miss Violet" - just 3-4 feet, full and nice purple color), a couple lantana, some zinnias and annual vinca from the garden center around mid-May. Deer and rabbits will mostly leave all of those things alone, and the annual vinca flower all the way to frost. If you want monarch caterpillars, look for some milkweed plants.
33 when I got up in Germantown -- no ice on the birdbath but some frost. Snow for our NE forum folks huh? They can have it.