Finally! I got a pic! I camped out by the puddle for a long time, camera ready. After several long minutes sweating in the Texas sun, I heard some sort of vocalization. I would have assumed it was a frog, except that I believe the sound came from the puddle monster. Sure enough, seconds later, a small, barely perceptible form emerged from the water, staying just at the surface. I snapped the camera, but when I went to move in closer, the creature submerged itself again. But I DID get the picture. I believe it to be the head of the creature. If you can't see in the first pic, I have circled it for you in the second pic.