Department of Environment

Invasive species are a major global threat to biodiversity and Pacific Islands are particularly vulnerable due to their isolation and relatively recent human occupation. Their native species often cannot cope with predation or competition from new arrivals. Niue already suffers from the impact of invasive species that have arrive in the country. However there are many more devastating species that are not present but found in other countries of the region and every effort needs to be made to prevent their arrivals.

Early settlers brought in animals (e.g. cattle, pigs, goats, cats, chickens and dogs) for food, pets and hunters for their survivals. Some of the animals were not well managed that they become wild (feral) and become problems. Feral pigs, cattle, goats tramp and graze on forest plants and garden crops that may result in desertification in some areas. Their manure deposits in water cause algal growth that makes water bodies look dirty. Feral and domesticated cats and dogs kill native birds, reptiles and insects, which leads to great loss of native wild life throughout the islands.