Coleoptera
Family: Scarabaeidae    Subfamily: Aphodiinae
Genus and species:

An Australian immigrant and widespread in New Zealand where it is especially common in the dry sandy soils of the Canterbury coast. Reputedly, millions of individuals have been seen forming a bank at the high tide strand...

A very widespread European species now present in New Zealand. First seen only a few years ago (?2004) on Banks Peninsula and Auckland it is widespread in Northland and is now spreading onto the plains near Christchurch....