Norway Rat

Rattus norvegicus is an introduced rat associated with water, coasts and human settlement. It differs from the ship rat through its heavier build, smaller ears and tail shorter than the head and body. The coat is coarse brown-grey and the muzzle is relatively blunt. Adults are robust and strong swimmers.

It occurs locally around ports, waterways, farms and towns on the main islands. Predator-free islands and fenced sanctuaries actively exclude it. It eats almost anything, including seeds, invertebrates, eggs and carrion. It commonly burrows and is most active at night.

New Zealand treats it as Introduced. It may be encountered around urban waterfronts in Auckland or Wellington, but it is not a viewing target.