המועדפים של ruby--

I observed this snake without knowing what a find it was. My family and I were walking along the rocks surrounding Lake Granbury at the "Granbury Beach" and noticed a somewhat large snake laying on the rocks. The snake was probably around 3-4ft long and slender. I took two photos (attached) and the snake remained on the rock, nearly two feet away, allowing us to observe him.
Later that night once we returned home I posted the pictures to a Facebook group intended for snake identification. A member of that group then directed me here.

Possibly hunting from log. About 2 feet from a rough stone retaining wall where minnows & shad concentrate when wind is from the south. Water depth is about 18 inches. For scale, the dock pipe is approximately 5 inches in diameter.

Yellow Blunt-headed Tree Snake
www.matthieu-berroneau.fr

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Micrurus diastema alienus (Werner, 1903).
Descripción: Roze (1996) examinó 48 ejemplares y determinó que ellos tienen de 193 a 203 (198.1)
ventrales y (30) hembras de 205 a 218 (211.8); de 48 a 54 (52.7) subcaudales en machos y de 39 a 45(42.3) en hembras, arriba del 80% de subcaudales no divididas; temporales siempre 1+2.

This snake was seen by a camper here on site #28, it slithered right through their campsite. By looking at the tail pattern/rattle and size I think this is the same snake that was spotted in August. At that time the snake had about 7 rattle segments and this one has eight, so it may have shed between them and now.

Keyed out using Powell et al. 2012: Key to the Hepetofauna of the Continental US. Posterior chin shields separated by 2 (not 1) scale. Two upper labials in contact with eye (not 1). One loreal (not 2). Ten upper labials (not 8).