New Zealand is home to several flightless birds, many of which live a long time,
At one time this wasn’t a problem as apart from three native bat species, there were no land-based mammals to threaten them until the introduction of rats, possums, stoats, ferrets
These omnivores invade the burrows of land birds and eat the eggs and baby chicks.
They also eat many of the same food consumed by our native wildlife, resulting in a shortage of available food.
The stoat was originally introduced from Britain to control the introduced rabbit population.
Possums were introduced from Australia to start a fur trade.
Cats and Dogs were brought in by early settlers.
Rats were stealthier and snuck in on canoes and ships.