It is a monomorphic species, with only one caste of worker, and polygyne, meaning a nest may have more than one queen.

[citation needed] Monomorium minimum are scavengers that will consume anything from bird droppings to dead insects.

[4] During mid-summer the queens and males perform the nuptial flight, mating in midair.

Each queen constructs a new nest, sheds its wings, and lays eggs.

[citation needed] In a laboratory setting queens were found to live about one year and workers about four months.