sentences:  "Monomorium antarcticum" are found throughout many habitats including native forest, grasslands, wetlands, pastureland, household gardens as well as horticultural and industrial habitats.There is some evidence to suggest that the range of "Monomorium antarcticum" in urban habitats may be restricted due to competition with exotic ant species, at least in northern parts of New Zealand.Worker specimens are variable in size, usually 3-5mm in length, with head width varying from 0.60-0.88mm.