Helophilus seelandicusHelophilus seelandicus, commonly known as the three-lined hoverfly, is a hoverfly endemic to New Zealand. The common name corresponds to the three black lines behind the insect's head.TaxonomyThis species was first described by Johann Friedrich Gmelin in 1790 and named Musca seelandica. The taxonomy of this species was most recently discussed by F. Christian Thompson in 2008.DescriptionThe adult fly is approximately 15 mm in length.DistributionThis species is endemic to New Zealand.Life cycleH. seelandicus maggots live in water with decaying vegetation, animals or dung.Interaction with humansDespite being native to New Zealand, this species is commonly reported to the Ministry of Primary Industries Pest and Disease Hotline.