Belfast, Northern Ireland — A peculiar fungus is transforming spiders into what some are calling “zombies,” taking over their bodies and altering their behaviors in eerie ways. The fungus, named Gibellula attenboroughii, infiltrates the spider’s anatomy, consuming its organs from within and exerting control over its brain chemistry.

Once infected, spiders are driven from their webs to venture into open spaces, where they meet their demise. This unsettling process triggers the fungus to sprout fruiting bodies from the dead spider, releasing spores that spread the contagion to new hosts. Estimates indicate these compromised spiders may linger for as long as three weeks before succumbing to the infection.

Reports of the white, calcified remains of affected spiders have emerged across various regions, including attics in the United States and gardens in the United Kingdom. Residents in the Czech Republic have also encountered these remains, stirring curiosity and concern.

Experts emphasize that Gibellula attenboroughii does not threaten humans in the way depicted in popular media, such as television dramas featuring mind-controlling fungi. João Araújo, a mycologist at the Natural History Museum of Denmark, noted that the evolution required for a fungus to infect humans would span millions of years.

Initially identified in Ireland during the filming of a nature documentary in 2021, G. attenboroughii was discovered on the ceiling of an abandoned structure where the infected spider was located. Dr. Harry Evans, an Emeritus Fellow at CAB International, traced the origin of the fungus back to the orb-weaving cave spider, Metellina merianae.

Evans and his team later noted the presence of the fungus in cave environments in both Northern Ireland and the Republic of Ireland, including within ecosystems inhabited by a related spider species, Meta menardi. Affected spiders exhibit unusual behaviors, leaving their usual habitats to die in the open, much like certain ant species affected by similar fungal infections.

The discovery of this fungus highlights a rich biodiversity of parasitic fungi in the British Isles, indicating that many more undiscovered species could exist. Evans remarked on the substantial unknown diversity within the fungal kingdom, estimating that only a fraction of potential species have been documented.

Although first noted in Ireland, sightings of G. attenboroughii have been reported as far away as Minnesota and Upstate New York. In the UK, a landscape worker made a chilling find when he uncovered a mass of spiders underneath a London garden deck—initially mistaking this clump for a cotton-like formation.

Reports continue to trickle in from various parts of the world. In Russia, for example, a resident found similar spider remains in a wine cellar, confused at first by their resemblance to moldy food. Meanwhile, an amateur naturalist in Scotland recounted witnessing an extraordinary sight while hiking: a creation resembling candy floss, which turned out to be a mass of spider bodies intertwined in a web-like structure.

Such discoveries not only spark intrigue but also encourage continued exploration into the mysteries of fungi and their complex interactions with the animal kingdom. The ongoing fascination with G. attenboroughii serves as a reminder of nature’s many enigmatic secrets waiting to be uncovered.