A NSW farmer has provided proof that size doesn't always matter in bush battle with a video of a daddy longlegs spider that ensnared a young brown snake.

Weethalle cereals farmer Patrick Lees posted a video of the unlikely match-up on his "Aussie Farmer" Facebook page last Friday.

Mr Lees said it was the first time he had seen a spider get the better of a snake.

"When I walked out to the shed … I saw this brown snake strung up by the daddy longlegs in its web," he told the ABC .

"People have this idea that everything in the bush is trying to kill you but this took it to the next level. I just thought it was a classic Australia moment and had to share it".

His video shows the dead serpent with its head resting on the ground and its tail strung up in the air with the spider's web wrapped tightly around it.

The farmer added that other spiders later arrived and spun webs around the snake's face and the rest of its body.

"There’s no way to tell whether the daddy longlegs killed it with its venom or just outsmarted it with its web, but it was clearly the winner," Mr Lees said.

"It's certainly not something you see every day."

The Australian Museum's arachnology collections manager Graham Milledge also credited the spider with the victory.

"The most likely scenario is that the snake got entangled in the spider's web," Mr Milledge said.