Thanks @wombey - are these guys actually the same species as the common green tree snake from down south, just with a local colour variation from being up in the top end? Both seem to be called Dendrelaphis punctulatus
Yes. Although there are several names appearing in the literature including the description of a specimen from Port Essington, NT, 1842, as Dendrophis (Ahetula) olivacea, current convention is that they all the same species. The type specimen as Leptophis punctulatus, 1826, is actually from WA.
Aaron, While I am as familiar with most Australian herps as the next herpo, I am not sure what you mean by "global" moderator. I can usually work things out, but don't consider myself as an expert world wide! How does this fit in with a local nature map? Call me on 0411255546 if it is easier to talk.