Caterpillar foods: primarily willow, but also poplars, elm, birch, hackberry (Bugguide)
This is one of the earliest butterflies we see in the spring. They spend the winter as adults, hibernating in brush piles or under bark. The adults feed on tree sap or rotting fruit.
3/17/2009
4/4/2008
4/15/2009 mated pair
6/16/2009 larva on willow
6/3/2010 there were at least a dozen of these larva on a small poplar
6/6/2006 chrysalis
6/15/2006 newly emerged adult
6/15/2006 newly emerged adult