The Myrmecia pyriformis ant species is monogynous and can have a colony size of several hundred workers. They have a medium development rate and the queen is around 23-26 mm in size, while workers are around 14-23 mm. They have a brown-black color and their nutrition includes food insects, fruit, and syrup. They require humidity levels of 30-50% in the arena and 50-70% in the nest.