What goes through your mind when you find a warning note on your car that a deadly snake was seen slithering inside?

This was the reality for a man in Sydney’s Sutherland Shire who had a brush with one of the world’s deadliest snakes.

Michael Garbutt returned from a walk in Kurnell on December 28 to find a red-bellied black snake curled up in his bonnet, but was luckily been forewarned by a passer-by.

Despite reading the note, Michael Garbutt was still surprised when he found the snake in his bonnet. (9NEWS)

A good Samaritan warns the driver of a snake inside his vehicle. (9NEWS)

“I just went out for a walk and came back to my car and there was the note and naturally as you imagine it was a bit of a concern for me,” Mr Garbutt said.

“I thought I need to find this thing before I take off. I looked under the bonnet and there it was.

“I didn’t actually notice it at first as it was pretty-much camouflaged.

“When I did see it, I thought this is a bit of a worry and I need to figure out how to get this thing away from my car.”

Michael Garbutt found the snake curled up in the bonnet of his car. (9NEWS)

The note from the good Samaritan read: “Hi, this afternoon a red-bellied slithered up into your front left tyre. Please be careful.”

Mr Garbutt responded: “I probably wouldn’t have known if the note wasn’t left there and had just driven home and had a problem at my house.

“At least I got it before it got to me.”

It took more than an hour for snake catcher Andrew Melrose to remove the venomous snake from the car.

It took more than an hour for the snake catcher to remove the venomous snake. (9NEWS)

He said it was not a surprise to receive the call from Mr Garbutt as rescuing snakes in vehicles were “common”.

“It’s one of those situations where a lot of these snakes do get a bit scared and a car seems like a good place to run and hide in,” he said.

“I’ve even had situation where people pull up on the side of the road and ring me where they’ve found a snake coming out of their grill.”

“Red-bellied black snakes are one of the most common snakes seen in the Sydney area.

Red-bellied black snakes are one of the most common seen snakes in the Sydney region. (9NEWS)