I had the good fortune to see the Birthday Party twice. The first time was in Chicago at a place called COD's on October 10, 1981; the second show was at the Mercury Cafe in Denver on April Fools Day, 1983.
Unfortunately, I did not have a camera with me for the first show -- but I did for the April Fools Day show. Most of the photo links here are from that show -- the others are from a Nick Cave & The Bad Seed show at the Azatlan Theater in Denver on October 31, 1986.
Except where noted, photos are ones I took.
If you have the patience, this link will take you to an article I wrote on The Birthday Party a few years ago.