We're in a suburb of Chicago and this year it's a drought! Saw a couple of them on 04/17/2012, spotted some eggs later, but all failed. Saw a couple more on 05/08/2012, same story. 2 days ago (06/14/2012) found an 1" caterpillar and brought it indoors. It's now almost 1.5" long but on the skinny side. We have > 20 milkweeds and there is always something in bloom in the garden since late March. Do other people around here have better luck?