Clip art is mostly line drawings, and most of that is
related to the Holiday season. I really don't think the
posters to alt.binaries.clip-art would appreciate my coming
in with a real-life frog photo and asking for an ID.

All images are posted on clip-art, not just line drawings.

Actually, very little line drawings are posted there.

Worth a try...put OT in the subject line. Worst they can do is flame
you or ignore you.