Habitat preferences and carcase colonization by sheep blowflies in the northern North Island of New Zealand

Abstract. In urban Auckland, from September 1991 to May 1992, only six specimens of the Australian sheep blowfly, Lucilia cuprina, were collected in farmed parkland and in garden habitats. The common green blowfly, Lucilia sericata, was the most common calliphorid trapped in these habitats. Neither of the two Lucilia species were found in native bush remnants in urban or rural areas where Calliphora hilli was dominant. Similarly very few L.cuprina (0.3% of the total) were trapped in rural rubbish tips in January and February where the majority of blowflies were again L.sericata. These results are compared with data collected from pastoral habitats, where L.cuprina is the major cause of flystrike. Lucilia cuprina was reared from five out of ninety-nine carcases found in rural areas. Calliphora stygia and L.sericata were the most common blowflies colonizing carrion and were reared from 59% and 51% of the carcases respectively.