The last thing Anthony Parker expected to come across while inside his family home was a tiger snake.

Mr Parker, from the town of Cascade just west of Esperance, literally jumped out of his chair when he noticed a tiger snake had been trapped by a mouse-trap late Monday afternoon.

"I came home from work at about 5pm, had a coffee and had a look at a few things on the internet and as I was sitting there I just heard the mouse-trap go snap," he said.

"I turned around, had a quick look and literally jumped off my stool because there was a snake about three metres away from me in the mouse-trap.