What is the difference between Oxybelis fulgidus and Ahaetulla nasuta?

Oxibelis has round pupils, which look a bit horizontal, because there's aback coloring of the iris. Ahaethula has keyhole-like pupils. Ahaethulla has more of a 'gaze' where Oxibelis looks you in the eye, so to say. And Oxibelis is from America, Ahaethulla from Asia.

Peter Mudde