I forgot to mention that I have a 2nd article in the same issue of Texas Parks & Wildlife Magazine, with a funny name -- Chicken of the Sea (World): Though it's known mainly for acrobatic marine life, SeaWorld also breeds Attwater's prairie-chickens. I wrote this article after going on a Behind the Scenes Tour at Seaworld this summer with the kids, which was really cool! It was the first year they had that tour. The article talks not just about the (endangered) Attwater's prairie chicken breeding program, but also about other conservation work Seaworld does that people may not be aware of.
I also wrote an article for Smithsonian magazine's April 2008 issue about Attwater's prairie chickens called Boom Time in their Points of Interest section (scroll down it's the second article down).