The best red-bellied black snake (which are classified as semi-venomous' apparently) I've seen was in the Wonnangatta Valley (Vic High Country) back in the '80s. We were camped near the river, and one glided through the bush while we were walking. Probably a good 5 foot, fat as mud and shiny. Had no concerns about us, or us about it as there was no element of surprise for either party.
The colouring of that one was with the classic red flanks, but that's in Vic and not up near Armidale like the one in this thread.