Warning as flesh-eating wasps are found in multiple parts of US for first time and experts don't know how they got here

FLESH-eating bugs that are nearly invisible might be crawling through the trees in your backyard, scientists warned.

Two mysterious parasitic wasp species somehow slipped into the US unnoticed, spreading from New York to the Pacific Northwest.

The parasitic wasps, called the Bootanomyia dorsalis species, lay their eggs in living plants and animals .

The terrifying creatures prey on native oak gall wasps, which live inside oak trees all over America.

Parasitic wasps settle into the oak trees and ravage their larvae, feeding on their soft bodies and tissue, killing them in the process.

The European parasites thankfully don't sting humans

By the time researchers discovered them, the bugs had already carved out separate homes on both American coasts.

DNA testing revealed that East C