Expert says huntsman spiders crawl over your face at night - but you don't know it.

What a huntsmen does at night will have you sleeping under the pillow.

A spider expert has revealed some spine-tingling habits of one of our most common house guests.

Australian Reptile Park ranger Michael Tate spoke to presenters John Stanley and Garry Linnell on their 2UE radio show about the not-so deadly beasts.

Tate said by the time a person reaches their mid 30s several huntsman spiders will have crawled over their face.

“By the time you’re 35 years old, and if you’re living in Sydney, several huntsmen will have walked across your face during your sleep,” he said.

“Huntsmen can walk across you and you wouldn’t know.”

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The ranger said the spiders appreciate the benefits of a full and bushy brow.

“It’s very likely that someone may have had prey caught on their face by a huntsman. Bushy eyebrows are the perfect hunting ground for a spider,” he said.

Watch out, Cara.

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Tate was sure to remind listeners that huntsmen could also be a very useful guest to have around the home.

“If you can cope with them, they are actually an asset in your home, and beneficial for taking care of the environment,”  he said.

They don’t pick towels up off the bathroom floor but eating mosquitoes makes a nice second best.

Here are some other great (terrifying) features of the huntsman spider!

The cling reflex

Huntsman spiders are known to “cling” if picked up – this makes them difficult to shake off and more prone to biting.

Not afraid to bite 

Huntsman spiders are likely to bite if their threat display is ignored.

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Jumping enthusiasts 

The species is known for its excellent jumping abilities. Eeeugh.

Quick little buggers

Huntsman spiders are incredibly fast – especially on car windshields.

Sweet dreams!