This is the problem with using common names in these posts. No one knows exactly what everyone else is talking about. I think that we are now all agreeing that the name “greenish rat snake” refers to black x yellow intergrades and not the greenish form of the yellow rat snake as shown in Tom’s photo.

http://forums.kingsnake.com/view.php?id=741123,741826

On the other hand, the term intergrade seems to get misused all the time. I have heard people calling Gulf Hammock Rat Snakes intergrades. Gulf Hammocks are a naturally occurring morph of the Gray Rat Snake that is genetically stable. That is to say that when you cross two Gulf Hammock Snakes, all of the offspring look like Gulf Hammock Snakes and not all over the map like you would expect to find in the cross between two yellow x gray intergrades. (The results of this cross would be expected to look like ¼ yellows, ¼ grays, and ½ in-betweens.)

I do have a question. Is there a natural intergrade zone for Everglades and Yellows? What do these snakes look like? What color is the tongue of those intergrades?

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