Try searching at HM Stamps:
http://www.hmstamps.com/Welcome.htm
You may have to search through the catalogs, but Dick (the owner) is pretty good about indicating which pages in the catalogs have the "critters" on them. You could try emailing Dick (
[email protected]) with a link to the card and see if he knows it off the top of this head. He tries his best to be helpful and I've gotten some awesome Penny Blacks from him.
Good luck!