The blue ant (Diamma bicolor), also known as the blue-ant or bluebottle, is a species of flower wasp in the family Thynnidae.

Despite its common name and wingless body, it is not an ant but rather a species of large, solitary, parasitic wasp.

They are unusual among members of the family Thynnidae in exclusively hunting mole crickets as larval provisions, whereas all other species of thynnids attack beetle larvae.

The cricket is paralysed with venom injected by the female's stinger and an egg is laid upon it so the wasp larva has a ready supply of food.

[3] Adults feed on nectar and pollinate various native Australian flowers, such as Lomatia silaifolia.