Amazed pest control technician discovers a 700-pound stash of acorns hoarded by 2 woodpeckers

• A pair of woodpeckers in California hid 700 pounds of acorns in a California home.
• The homeowners called Nick's Extreme Pest Control when they saw worms coming out of their walls.

A pest control expert in California was stunned when he came across hidden treasure belonging to a pair of woodpeckers.

Nick Castro, the owner of Nick's Extreme Pest Control, was called to a California home in Sonoma County when the owners noticed worms coming out of the wall.

Much to his surprise, when he made a small cut in the wall, acorns started pouring out– and they didn't stop coming.

Castro estimates that the gigantic hoard of thousands of acorns, shoved into the property's walls by two industrious woodpeckers, weighed 700 pounds. He said it could have taken up to five years for the birds to build the incredible acorn stash, reported CNN.

The business owner posted on Facebook that he'd "never seen anything like this."

"On a scale from 1 to 10, this is a 10. It's a one in a million chance to find something this significant," Castro told CNN, adding, "I expected to find a few handfuls, nothing like this."

He told the news site that he and his three employees filled eight bags full of the stored nuts, which were so heavy they were hard to pick up.

California is part of the home range of the acorn woodpecker that typically drills into trees to store acorns in "granaries" or "storage trees." The granaries can consist of thousands of holes, each of which may be filled by a single acorn in the autumn.