[1] The ants are recorded in the south eastern part of the country, but are most common in the Australian Alps at elevations above 300m but can be found down to sea level around Melbourne and in Tasmania.

Their large size gave them their name, although most are slightly smaller than the traditional inch (25.4 mm).

The reputation for being the most venomous ant is possibly due to the tendency of the toxin to induce anaphylaxis which can be fatal in some people.

The reaction is local; swelling, reddening and fever, followed by formation of a blister.

The heart rate increases, and blood pressure falls rapidly.