A deadly Eastern Brown snake has been found in a backyard in Adelaide's northern suburbs with its head stuck in a beer can.

Mawson Lakes resident Lauren Lehman said she walked outside to find the four foot snake in her yard.

"I screamed, I cried, I felt sick, I didn't know what to do," she said.

Ms Lehman called in Ian Renton from Snakes Away to remove the deadly creature.

"In the last 30 years that I've been in the industry I've probably only seen six to seven of these issues," he said.

Mr Renton's son Corey was filmed carrying out the delicate operation to free the trapped snake.

"I'm now going to try and cut his head free and hopefully I can do this without getting bitten," he said in the video.

Eastern Brown snakes are found across Adelaide and the suburbs, with Mawson Lakes one of the most common places for snake catcher call-outs.