I was down in the gully north of Lawson in the Blue Mountains and this snake was basking in my path; 800mm to a meter probably. Acted much like a Red-bellied Black: straight into the first hole it could find. Waited about 15 minutes and it came up and buggered off. I'm not good at identifying them and still rely mostly on coloration, which in this case isn't particularly telling. Thanks in advance.