This map of New Zealand shows the areas where sandflies are most likely to be a nuisance. The West Coast of the South Island stands out as sandfly country. This is not surprising, as sandflies breed in the swift-flowing bush streams that abound in this region. On the South Island’s relatively dry east coast, sandflies are seldom a problem.
Te whakamahi i tēnei tūemi
Te Ara - The Encyclopedia of New Zealand
Source: Marjorie Orr, Those sandflies. Whatamango Bay: Cape Catley, 1996
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