Pastureland is not a good habitat for kiwi. The kiwi can be killed when land is cleared out by burning and large rollers that are used to crush vegetation.
Habitat loss can also put kiwi and their predators into smaller areas together. Their social organization can also be changed, because of their territorial tendencies. The less habitat means the more and more competition for space, which will cause more boundary wars, less breeding, and more kiwi being pushed into farmland where dogs can kill them.
The main predators for kiwis are stoats and cats, which can take a heavy toll on the younger birds for the first three month of their lives. Dogs are more so hard on adult birds, which can be bad for their species since they're the breeding birds, and without them there aren't any eggs or chicks for the population to increase. Ferrets are also known for killing kiwi. Other animals like possums kill both adult and kiwi chicks, as well as destroying their eggs and their homes.
The stoats (or ermines or weasels) are an nonnative species that came to New Zealand in the 19th century, mainly to combat other nonnative species like the rabbit. Yet it refused to change it's diet from just rabbits, and switched to kiwi chicks instead. Stoats can be very hard to catch, so different programs have been put into place to make up for the damage done to the species. Farmers are trying to help by taking matters into their own hands, and introducing another species to get the stoats, the possum.
Since kiwi are so adaptable to their environments, they can be found in a range of habitats; exotic forests, farmlands, tussocks, mangroves, even sand dunes. They prefer wetlands, and dislike places with livestock.
Kiwis build burrows instead of nests like most birds, so that they can lay eggs. They can be found deep in forests, river lands, and busy plains.
Kiwi live all over New Zealand, with different species living on the two main islands.
Kiwi are timid by nature, and aren't usually the type of animal that stays close to human habitats, so they're not the ones to be very active with other species. They are very territorial with not only themselves, but with other animals, and are very protective of their burrows. Kiwi have evolved to fit the niche that would be filled by mammals, yet since New Zealand's known for its isolation, this species had taken on this lifestyle. Other than it's many predators, kiwi don't interact with different animals. The only species that come in contact with kiwi are humans when working on programs and conservation acts to save them from endangerment.