Kerry Hancock's quiet country home now looks more like the Bat Cave.

Imagine living next door to noisy, smelly neighbours who defecate all over your house and lawn, and make such a racket you can't even open your windows.

That's life for Kerry Hancock, whose quiet country home now looks more like a bat cave.

"Just screeching and screaming from sunup to sunset," Kerry told A Current Affair.

"They don't take Sundays off. They live on church-owned land, but they don't take Sunday off."

The 75-year-old has lived peacefully in his home for six years, until three months ago, when a 10,000-strong colony of flying foxes moved in.

"Of an afternoon they almost block out the sun," Kerry said.

"It's driving me bloody nuts ... batty is an understatement."

The former farmer has worked the land all his life, but Kerry claims he's never experienced anything quite like this.

"Someone's bad BO and bad stinking feet, it doesn't even touch the smell of them, but knowing that they carry fleas and lice and their droppings carry, from what I can be told, numerous diseases," Kerry said.

Just about the only perk of the flying freeloaders circling Kerry above, the ground below has never looked better.

"The lawn mower disturbs them, and as far as I can find out, they can't stop me from mowing my lawns," Kerry said.

"They can't make me live with unmowed lawns. But when I start the ride on lawn mower up, the bats take off."

John Tracey from the Wildlife Preservation Society says these aren't just your garden variety flying foxes: among the mixed colonies are rare, endangered species.

"Flying foxes contribute more to ecosystem services than any other Australian mammal," Tracey told A Current Affair.

"I'd encourage him to protect them, they are the custodians of our forest.

"If you've got flowering bloodwoods or spotted gums or ironbark in the area that may be a key food source for them, so they'll follow those nectar flows and eucalypt flowering in the area and they're likely to move on next year."

It's good news for Kerry, who's just hoping they go like bats outta hell.