flying ants...different kinds of ant fly..reproductive male ants and female ants fly. The ants swarm and mate in the air. The males then die and the females go in search of a place to set up their own colonies. The loose their wings and then go underground. They lay their eggs and a new colony has begun. If they sting then they would be a variety of the fire (red) ants.
Australian Bulldog worker ants and Bullet ants grow to 2.5 cm., which makes them the largest worker ants. But, of course, queen ants are the biggest in each breed of ants, though I don't know how big the Bulldog ant queens are. A queen Driver ant can reach up to 5 cm, and soldier Driver ants can grow to 1.5 cm.
Most ants do not fly. However, in may ant species the newly hatched queen ants (and their male counterparts) emerge with functional wings which they use to disperse and mate. Once mated they then normally shed their wings prior to establishing a new nest/colony. Thus they fly to disperse their species into new territories.
No. The average ant can't. Worker ants are wingless. However, both male ants and the virgin queen ants have wings that allow hem to fly for the mating. Once fertilized, the queen ant bites off her wings and starts the colony. The male ants, having done their duty, die. So the answer becomes - most can't, but some can and do in the early summer.