
25/09/2025
Ireland’s woodlands are witnessing a creepy twist in nature: a parasitic fungus that takes over spiders.
The fungus infects its host silently, spreading through the spider’s body and eventually reaching its brain. Once inside, it manipulates behavior—forcing the spider to abandon its usual patterns and carry out actions that benefit the fungus instead of itself. Essentially, the spider becomes a zombie under fungal control.
After the fungus has drained the spider’s energy and positioned it in an ideal spot for spreading spores, it kills the host. From the co**se, new fungal growth emerges—ready to infect the next victim.
This phenomenon isn’t entirely unique—similar “zombification” tactics are seen in ants infected by Ophiocordyceps fungi in tropical regions. But the spread in Irish spiders shows just how widespread and adaptable these parasites can be.
Why does this matter? It highlights how fragile and strange ecosystems are—where even predators like spiders can be turned into pawns by microscopic invaders.