Is spring here yet?

This winter has been unusually cold here in Central Virginia. I know that in other parts of the U.S. it has been, also. I have not seen any butterflies flying since the first week in November, unlike last year when I saw a few Cabbage Whites of Sulphurs occasionally. We do have robins in the yard finally, so it they portend the end of winter, that's good. We have lots of bluebirds, also. I would like to put up another nesting box for them soon.
This week I will be speaking at the Capital Home and Garden Show just outside Washington, D.C.
http://www.fairfaxtimes.com/events/2413/
I will be doing two programs: Butterflies and Plants ~ An Essential Relationship and If You Plant it, They Will Come ~ Attract 10 or More Species to Your Yard Without Really Trying. I am looking forward to it. I want to incorporate the idea of having butterfly releases in my presentations, also. I have books to sell and the shadow boxes and bell jars of the butterfly vignettes I have worked on over the winter.
I am raising Painted ladies and have quite a number of eggs, which are just beginning to hatch now.