My 7-year-old daughter found one of these outside our home in Amherst. We did not know what it was at first, and she was upset that it was not eating. Then I got out my Wagner guide, identified it, and saw that Lilac was one of its larval hosts; a couple grew right next to where she had found the cat originally. She brought some in and the critter finally started eating. She released it rather than keeping it through emergence... But, because of that experience, I instantly recognized this one when I came across it a couple of weeks later. This one was eating Witch Hazel rather than Lilac.