Yes, we saw a Gila Monster today! It is a large venomous lizard native to the Southwest US and Mexico. They are becoming more rare and are protected by state laws. It is illegal to "harass, harm, pursue, hunt, shoot, wound, kill, trap, capture, or collect the Gila Monster."
The last time I saw one, I was able to get more pictures. Click here to see the Gila Monster at De Grazia Gallery.
Update: I checked the hole in the wall a couple of days later and the Gila Monster was gone.