Invasive Species

The Indian, or common, myna, Acridotheres tristis (Sturnidae: Passeriformes: Aves) was introduced throughout New Zealand in the 1870?s by locals and Acclimatisation Societies (Bull et al., 1985). Birds subsequently established in most of the North Island, with high densities present in the urban and suburban areas. Common mynas continue to flourish in the northern and central North Island, and are usually more abundant than most native birds in gardens and parks (LCR, 2008)

The intentional and unintentional transfer of species from one water body to another around the world has boomed in recent decades. Many seas and regions have been invaded by a high number of non-native species. Some of these species thrive in their new habitats, out-competing native species and changing

Pacilic island countries are particularly vulnerable to the effects of invasive species. After habitat destruction or modification, invasive species are responsible for more species extinctions than any other cause. Further, the rate of extinction of native species has been higher on islands than anywhere else in the world. Invasive species have also degraded native ecosystems.

Invasive alien species are recognised as one of the leading threats to biodiversity and also impose enormous costs on agriculture, forestry, fisheries, and other human enterprises, as well as on human health. Rapidly accelerating human trade, tourism, transport, and travel over the past century have dramatically enhanced the spread of invasive species, allowing them to surmount natural geographic barriers. Not all non-indigenous species are harmful. In fact the majority of species used in agriculture, forestry and fisheries are alien species.