Nocturnal. Shelters (sometimes in groups) in a grass nest they make in hollow logs or under grass tussocks, rocks or logs. Their flexible breeding pattern means they can breed quickly anytime between late winter to late summer when there is enough food. Dunnarts can have 2 to 3 litters per season with up to 10 young per litter. The young are weaned at 10 weeks. Dunnarts have short sharp teeth suited to crunching insects and spiders. Their scats have visible insect remains. The use of agricultural pesticides could affect their survival.