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The bullet ant (Paraponera clavata) gets its name from the shot of intense pain it delivers with its venom-filled sting. The recipient experiences its agonising effects for the next 12 - 24 hours.

Living in the South American rainforest and growing to around an inch (2.54cm) long, most of us are capable of keeping out of its way.


at PAIN level four you don’t want to know

However entomologist Dr Justin Schmidt has got close enough to this vicious ant in attack mode to rate its sting as the most painful in the world.

He describes the experience as: “Pure, intense, brilliant pain. Like walking over flaming charcoal with a three inch nail embedded in your heel.”

Dr Schmidt, from the Southwestern Biological Institute in Arizona, US, is no stranger to the pain inflicted by insects. He reckons he’s been stung more than a thousand times by 150 different species – mainly accidentally, but occasionally on purpose.

As the man behind the Schmidt Sting Pain Index – which rates the pain caused by the stings of different hymenoptera (a group of insects that includes wasps, bees and ants) – leaving well alone has never been an option.

It lists pain on a scale from one to four and unsurprisingly the bullet ant tops the charts.

  • Level 4: bullet ant, tarantula hawk wasp
  • Level 3: paper wasp, harvester ant
  • Level 2: honey bee, yellow jacket wasp, bald-faced hornet
  • Level 1.5: bullhorn acacia ant
  • Level 1: fire ant, sweat bee

“Level four you don’t want to know,” explains Dr Schmidt.

“The pain is so immediate and intense that it shuts down all illusions of life as normal. Imagine sticking a finger in a 240 volt electrical socket.”

Rated just beneath the bullet ant for the excruciating, but shorter-lasting nature of its sting is another tiny terror, the tarantula hawk wasp. Females use their venom to paralyse much larger tarantulas to feed to their offspring.

“Blinding, fierce, shockingly electric. A running hair drier has just been dropped into your bubble bath,” is the description given by Dr Schmidt.

The pain inflicted by the humble honey bee comes bang in the middle of the scale at a pain level of two.

Dr Schmidt has experienced most of the stings while collecting live nests in the field, but his interest in this form of defence mechanism was first piqued when he was bitten after sitting on an ant hill as a child.

You probably can make an argument I am crazy, but I enjoy what I do

by Zoe Gough