Interesting post. I was stationed at Charleston AFB years ago and most of the ratsnakes I found west of hwy 17 and in the Frances Marion NF were of the Greenish type. Some were pretty and some looked like junkyard dogs. I have found several that looked like pure yellow rats but they were found much closer to the coast than the others.
I also have a cross between a male yellow rat and a light phase female gray rat. I'll have to post a photo. She doesn't look anything like a Gulf Hammock.

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