There is no easy way to tell if an ant can sting until it has stung you! By studying ants you will soon be able to identify which species are which and whether or not they can sting.
The ants found under the species section, have been given a ‘risk rating’ this takes into account their ability to bite and sting.
No ant stings are deadly to humans, and most ant stings are not that painful, but beware that there are a few out there that have a real punch! see ‘Ant Bites and Stings‘ for more info.