That's a Mexican Parrot Snake (Leptophis mexicanus) which I don't believe has any venom. The Mexican Vine Snake (Oxybelis aeneus) and the Green Vine Snake (Oxybelis fulgidus) both have mild venom.
by jove i think your right! i am looking at a Les Belesky book who calls it a green headed tree snake. i better go change all my tags!! thanks! for the link too!
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