The butterflies of New Zealand include twelve endemic species, as well as several introduced and migrant species. Lepidoptera, which includes the butterflies and moths, is the third largest insect order in New Zealand.
Very little is known about any butterfly extinctions since human settlement of New Zealand since they leave few remains. The majority of New Zealand invertebrates are found in forests, so it is possible that some butterflies became extinct due to the large scale forest clearance after human settlement.[3]
Very occasional migrants
Apart from the rare but consistent sightings of Australian migrant butterflies, several other species have also been recorded on the island over the years.
The small tortoiseshell (Aglais urticae), which is a butterfly native to Eurasia, was spotted near Lincoln University, Canterbury, on 13 August 2019, though the method of its introduction remains unknown.[4]
The blue triangle (Graphium choredon), most likely from Australia, appeared in a Prebbleton garden feeding on aster flowers on 15 March 2017, likely carried by wind currents.[8]
The Asian swallowtail (Papilio xuthus) has been recorded in Dunedin in 1996, when a pupa emerged on a car which had recently been imported from Japan. Two further sightings were made in Auckland in 2011 and 2016, likely from the importation of citrus trees.[9]
The black Jezebel (Delias nigrina) was seen in Waikaia, Southland, after it was rescued from a spider web in January 2010, with its arrival also attributed to wind currents or unknown factors.[10]
The common Mormon (Papilio polytes) was seen in the Westshore suburb of Napier, Hawke's Bay on 22 January 2014. The specimen resembled subspecies from Malaysia and Hong Kong. It is attributed to shipping of citrus or curry leaf plants.[7]
Other species of Lepidoptera, such as saturniid moths have been sighted due to similar causes.