Sandflies
The New Zealand Sandfly (Maori name: Namu) is actually a member of the blackfly family. They are only 2-3mm in length and only the females bite as they need blood to produce eggs. They are most commonly found close to flowing water and native bush and breed in fast flowing rivers and streams. Eggs are laid on rocks or plants at or below water level. Sandfly saliva contains anticoagulants which keep the blood flowing. These cause an allergic reaction which results in itching and swelling. As well as humans, sandflies feed on bats, penguins, birds, seals and domestic animals. Follow this link for more info on the breeding cycle of sandflies. Bite Prevention Sandflies are most active in calm, overcast, humid conditions and are typically more active at dawn and dusk. Bites can be reduced by covering up at these times. It is a good idea to close windows and doors half an hour before sunset. As the day cools, sandflies are more likely to come into your house. Also, when stopping at an idyllic natural spot (especially on the South Island’s West Coast), close your car doors and windows. It won’t take the sandflies long to infest your car. If you do find your car full of sandflies, put the heater and fan on full blast. That usually takes care of them in a few minutes.
