This Rough Green Snake was observed slowly making his way up a small bush in the Joppa Preserve area of the Great Trinity Forest. At first glance, he looks like just another vine. Would you have seen him?
Wikipedia has this to say about the Rough Green Snake:
Opheodrys aestivus, commonly known as the rough green snake, is a nonvenomous North American colubrid. It is sometimes called grass snake or green grass snake, but these names are more commonly applied to the smooth green snake (Opheodrys vernalis). The European colubrid called grass snake (Natrix natrix) is unrelated. The rough green snake is docile, often allowing close approach by humans, and seldom bites.