From this photo it is hard to tell, but if you still have the snake get a look at the belly scales, if they cover the bottom (belly) of the snake (wide scales) it's not venomous, if it has not very wide scales on it's belly then it isnt venomous. An educated guess says it's a python because of the thickness extending to the head. (Does it have big eyes?) No it is DEFINITELY NOT A TAIPAN, i live in taipan country and it is as obvious because as you can see- 1. It has no 'lips' (ridges) above it's eyes. 2. It is entirely the wrong colour. 3. it is too fat for it's size. Hope this helps- Get back to me about the belly scales and eyes, maybe a better photo?