Identificaciones de awebster

Larry Ditto and I seined about a dozen amphibians we did not recognize from a small stock tank on a private ranch in Kenedy Co. We tried to photograph them on land, but they were slippery and hard to hold. We got a few shots on wet grass, then released them back into the tank. We tentatively identified them as Rio Grande Lesser Sirens after looking through some field guides.
THIS AREA IS NOT OPEN TO THE PUBLIC AND IS BEHIND LOCKED GATES.

I'm having a difficult time trying to figure out what kind of caterpillar this is. It has a white line that runs down the center of its back. It also has what I would describe as eye markings that are blue and they run down both sides of it.

This whipsnake was foraging near a water feature at a bird photo blind that I was in. The snake drank and let me get a couple of shots then left. I do not know if this can be confirmed as "Ruthven's" from photos, but that is what I called it at the time.

THIS AREA IS NOT OPEN TO THE PUBLIC AND IS BEHIND SEVERAL LOCKED GATES.

Eastern Massasauga Rattlesnake (Sistrurus catenatus catenatus) from Hastings, Michigan. She had recently come out of her burrow and had a lot of silt on her, but to show her pattern better, I poured some water on her.

This whipsnake was foraging near a water feature at a bird photo blind that I was in. The snake drank and let me get a couple of shots then left. I do not know if this can be confirmed as "Ruthven's" from photos, but that is what I called it at the time.

THIS AREA IS NOT OPEN TO THE PUBLIC AND IS BEHIND SEVERAL LOCKED GATES.