Demansia psammophis psammophis (Yellow-faced Whip Snake)
No IUCN Status.
Fun trivia: This is the first species I've encountered the IUCN redlist is completely ignorant of.
Though they produce venom, these are common small snakes that are generally considered not thought of as dangerous. My field guide warns of "painful local reactions" and this pretty impressive photo
would back that up (though someone with experience reckons being bitten was less painful than a bee sting). However it's worth keeping in mind that should you be bitten, severe alleric reaction is always a risk. I'm not going to rush out personally.
Like most animals, identification of snakes is tough. At first glance, even the very experienced catcher I was with didn't know if it was a juvenile eastern brown (in his defence it was obscured the shade cloth it was caught in). The point being that it's simply too hard, and too risky for non-experts to make the snap risk assessments in attempting to handle snakes that often you only got a glimpse of before having to decide whether to "grab" or not. However, when you're with someone who does know, it's an impressive thing to see.