Is this a scratch or a venomous snakebite?

There are no puncture marks to be seen after a patient's close encounter with a snake
Dr Shaun Greene
Pressure bandage

Tom is a 55-year-old farmer, brought to your rural ED by his friend, Shane, following a suspected snakebite.

They explain that as Tom was helping clear rubbish from around Shane’s garden shed, he noticed a snake.