I went for a walk on my own last Saturday. Absent mindedly wandering a long a recently re-opened section of track, I almost trod on what initially looked like a metre or so long red-bellied black snake lying across the track.
I backed off and it quickly slithered away but I noticed that the underbelly was bright-ish yellow rather than red.
Unfortunately too quick to get a photo. But my research so far suggests it might be either a Highlands Copperhead or a black variety of the Green Tree Snake. Do either of these sound credible? Any other ideas of what it could be?