Australian scientists have discovered a larger and more venomous species of the Sydney funnel-web spider, one of the deadliest arachnids in the world.

Under Nickname BIG BOY this new species was first found in the early 2000s near Newcastle, about 170 kilometers north of Sydney, Researchers said. The discovery was made by Kane Christensen, a spider enthusiast and former head of spiders at the Australian Reptile Park. Christensen described the spider as significantly larger, with notably bigger venom glands and longer fangs compared to the common Sydney funnel-web.

On January 13, researchers from the Australian Museum, Flinders University, and Germany’s Leibniz Institute officially classified “Big Boy” as a distinct species, naming it Atrax christenseni in honor of Christensen’s contributions. Measuring up to 9 centimeters (3.54 inches) in length, this spider is nearly twice the size of the typical Sydney funnel-web, which grows to about 5 cm.

A Deadly Nocturnal Predator

Funnel-web spiders are black, nocturnal creatures typically found within a 150-km (93-mile) radius of Sydney. They are most active from November to April, often venturing into homes at night. While only male Sydney funnel-webs carry venom strong enough to be fatal to humans, their bites have caused 13 recorded deaths in the past.

Fortunately, no fatalities have been reported since the introduction of antivenom in 1981. The same antivenom used for the Sydney funnel-web is effective against bites from Atrax christenseni, offering reassurance to anyone who might encounter this new species.

Christensen noted that the “Big Boy” spiders can sometimes wander into garages, bedrooms, or other areas inside homes. Like their smaller relatives, they are known for their distinctive funnel-shaped webs, which they weave in cool, moist, and sheltered habitats such as rotting logs, under rocks, and among shrubs.

A Glimpse into the Arachnid World

The discovery of Atrax christenseni sheds new light on Australia’s diverse and fascinating spider population. It also highlights the importance of ongoing research to better understand these creatures and ensure public safety.

The Australian funnel-web spiders are shiny, dark arachnids; it  might look intimidating, but it is their venom that is the real concern. While they are not the most venomous spiders out there, the Sydney funnel-web spider has a pretty grim track record, with at least 13 reported deaths attributed to its bite.