This aluminum fire ant colony cast is the largest of the five cast session and the largest one (by weight) that I have done so far. I was able to get a great cast of the above ground portion of the colony too, which isn't always the case.

This one, and the others in the five cast session, was a colony built in fairly dense clay. It took much longer to wash off the thick clay than is shown in the video.

The finished cast is #076 and you can see more pics and info on the site at http://www.anthillart.com/castings/076/